toggle menu

Home / Computing & IT / Telecom

Computing & IT >> Telecom Abbreviations

Look through 4999 acronyms and abbreviations related to Telecom:

• IPB — Invision Power Board
• XFMR — Transformer
• DDRS — Dynamic Data Rate Selection
• CBCU — Centralized Broadband Control Unit
• DCE — Data Circuit-terminating Equipment
• DWDM — Dense Wavelength Division Multiplexing
• LAN — Local Area Network
• DOE — Distributed Object Environment
• EBITDA — Earnings before Interest, Taxes, Depreciation and Amortization
• ECG — Electrocardiogram
• SYN — Synchronous
• GFSK — Gaussian Frequency Shift Keying
• CT — Computed Tomography
• ETA — Estimated Time of Arrival
• CSR — Customer Service Representative
• BRDF — Bidirectional Reflectance Distribution Function
• C3I — Command, Control, Communications & Intelligence
• YMMV — Your Mileage May Vary
• CSMA/CA — Carrier Sense Multiple Access/Collision Avoidance
• APR — Annual Percentage Rate
• XML — Extensible Markup Language
• CSMA/CD — Carrier Sense Multiple Access with Collision Detection
• CONG — Congestion message
• CSMA/CD — Carrier sense multiple access / collision detection
• CSMA — Carrier Sense Multiple Access
• ROM — Read-Only Memory
• IAMAI — Internet and Mobile Association of India
• ISAR — Inverse Synthetic-Aperture Radar
• IQ — Intelligence Quotient
• YTD — Year To Date
• RDF — Resource Description Framework
• YGWYPF — You Get What You Pay For
• FTP — File Transfer Protocol
• ATOM — Any Transport over MPLS (Multi-Protocol Label Switching)
• OIC — Oh I See
• DAM — Diagnostic Acceptability Measure
• X-BAR — Crossbar telephone exchange
• RAEX — Roaming Agreement EXchange
• MLS — Microwave Landing System
• S-BCCH — Short Message Service Broadcast Control Channel
• LASER — Light Amplification By Stimulated Emission Of Radiation (cf. Maser)
• XA-FR — Exchange Access Frame Relay
• D-H — Diffie-Hellman
• MAN — Metropolitan Area Network
• X-ON — Transmitter On
• FDIC — Federal Deposit Insurance Corporation
• X-OFF — Transmitter Off
• ADM — Add-Drop Multiplexer
• ASAP — As Soon As Possible (pronounced AY-sap)
• S X S — Step-by-Step

• UAX 14 — Unit Automatic eXchange type 14
• ANSI — American National Standards Institute, Inc.
• DWDM — Dense Wavelength-Division Multiplexing
• ISO — In Search Of
• ZDBOP — Ziff-Davis Benchmark Operation
• IT — Information Technology
• LED — Light-Emitting Diode
• VIP — Very Important Person
• WACN ID — Wide Area Communications Network IDentifier
• BBS — Bulletin Board Service
• C-NBAP — Common Node B Application Part
• CPU — Central Processing Unit
• UK — United Kingdom of Great Britain and Northern Ireland
• SABGW — System Architecture Evolution Gateway
• CPE — Customer Premises Equipment
• B-ICI — Broadband Inter-Carrier Interface
• BPM — Beats Per Minute
• A-KEY — Authentication key
• T-IC — T-interConnect
• OC-18 — Optical Carrier Signal, Level 18
• M-CSI — Mobility management CAMEL (Customized Applications for Mobile network Enhanced Logic) Subscription Information
• BTW — By The Way
• IRC — Internet Relay Chat
• AUP — Acceptable Use Policy
• OC-9 — Optical Carrier Signal, Level 9
• VC-ATOD — Virtual Clearinghouse on Alcohol, Tobacco and Other Drugs
• I.LINK — IEEE 1394, High Performance Serial Bus, implementation
• OEM — Original Equipment Manufacturer (usually in reference to car parts)
• H323 — ANSI standard for format over IP
• DSC — Differential Scanning Calorimetry
• F2F — Face To Face (also Meeting In Person)
• E-LEAD — Ear Lead
• T-CARRIER — Trunk Carrier
• RF — Radio Frequency
• DND — Do Not Disturb
• TEMIP — Telecommunications Management Information Platform
• KBYTE — Kilobyte (103)
• D-NBAP — Dedicated Node B Application Part
• CDR — Critical Design Review
• DAHDI — Digium/Asterisk Hardware Device Interface
• OC-256 — Optical Carrier Signal, Level 256
• WWW — World Wide Web
• RFQ — Request For Quotation
• DBORS — Data Base of Records
• ISO — International Organization for Standardization
• VAZO — Violating All-Zero Octet
• QC — Quality Control
• FEMA — Federal Emergency Management Agency
• C4I — Command, Control, Communications, Computers, & Intelligence
• LCD — Liquid Crystal Display

• ECU — Electronic Control Unit
• IP — Internet Protocol
• DAC — Discretionary Access Control
• BVR — Beyond Visual Range
• PDR — Preliminary Design Review
• AFAIK — As Far As I Know
• C³CM — Command, Control and Communications Countermeasures
• TNYWR — The Number You Will Receive
• WTG — Way To Go
• NB — Nota Bene. Abbreviation of the Latin expression commonly used to emphasise the importance of a statement, literally meaning 'observe well'. Or less politely and more amusingly, No Bullshit.
• EDI — Electronic Data Interchange
• ATM — Automatic Teller Machine
• COB — close of business (End of duty day)
• CSA — Canadian Space Agency
• GSM — Global System for Mobile Communications
• AC — Alternating Current
• EAP — Employee Assistance Program
• FET — Field Effect Transistor
• CUG — Closed User Group
• CCB — Change Control Board
• PPM — parts per million
• POC — Point Of Contact
• SAR — Search And Rescue
• IRL — In Real Life
• ESA — European Space Agency
• UDP — User Datagram Protocol (FDDI related)
• LRU — Line Replaceable Unit
• DSCP — Differentiated Services Control Point
• CY — Calendar Year
• IRR — Internal Rate of Return
• ACH — Automated Clearing House
• ABI — Application Binary Interface
• ACC — Adaptive Cruise Control
• VAT — Value Added Tax
• PSK — phase-shift keying
• WML — Wireless Markup Language
• CCSDS — Consultative/Consultative Committee for Space Data Systems
• QFSK — Quadrature Frequency Shift Keying
• ISP — Internet Service Provider
• ACE — Access Control Entry
• DFD — Displaced Frame Difference
• ACK — ACKnowledgment
• CCM — counter-countermeasure
• MBR — Master Boot Record
• NMSE — Normalized Mean Square Error
• TQM — Total Quality Management
• BTU — British Thermal Unit
• ATTN — Attention
• RPI — Retail Price Index
• CV — Curriculum Vitae

• DBMS — Database Management System
• LLC — Limited Liability Company
• CD — Compact Disc
• CEO — Chief Executive Officer
• BIP — Bit-Interleaved Parity
• SMTP — Simple Mail Transfer Protocol
• RFP — Request For Proposal
• ASA — American Standards Association
• NOS — Network Operating System
• EIS — Executive Information System
• AATSR — Advanced Along-Track Scanning Radiometer
• WWW3 — World Wide Web Consortium
• FIFO — First In, First Out
• GATT — General Agreement on Tariffs and Trade (government)
• PDA — Personal Digital Assistant
• GIS — Geographic Information System
• WEP — Wired Equivalent Privacy
• HTTP — Hypertext Transfer Protocol
• MOU — Memorandum of Understanding (an MOU between Food & Drug Administratin and a regulatory agency in another country allows mutual recognition of inspections)
• VM — Voice Mail
• ATA — Area Transportation Authority
• BUR — Bandwidth Usage Redundancy
• PDF — Portable Document Format (created by Adobe Acrobat)
• ASME — American Society of Mechanical Engineers
• ADSL — Asymmetric Digital Subscriber Line
• R&D — Research & Development
• ASTM — American Society for Testing and Materials (Philadelphia, Pennsylvania)
• NFS — Network File System
• PDT — Pacific Daylight Time
• LRJ — Location Reject
• AIR — Account Information and Refill
• WBS — Work Breakdown Structure
• SRAM — Static Random Access Memory (ess-ram)
• MRI — Magnetic Resonance Imaging
• ATM — Asynchronous Transfer Mode
• MB — Megabyte
• WDM — Wavelength Division Multiplexing (fiber optics)
• RDY — Ready
• THX — Thanks
• AIS — Automated Information System
• CS — Computer Science
• SDMA — Space Division Multiple Access
• EOM — End Of Message
• RWR — Radar Warning Receiver
• FM — frequency modulation
• ALC — Automatic Level Control
• AES — Advanced Encryption Standard
• ABC — activity based costing
• IPO — Initial Public Offering
• FAR — Federal Aviation Regulation

• SAN — Storage Area Network
• PDH — Plesiochronous Digital Hierarchy
• BRB — Be right back
• COR — Carrier Operated Relay
• MMS — Multimedia Messaging Service
• MST — Mountain Standard Time
• CGI — Common Gateway Interface
• ACO — Additional Call Offering
• API — Application Programming Interface
• DDD — Direct Distance Dial
• DOA — dead on arrival
• ASCII — American National Standard Code for Information Interchange
• URL — Universal Resource Locator
• STS — Space Transportation System
• EST — Eastern Standard Time
• AM — Ante Meridian
• APT — Automatic Picture Transmission
• Y2K — Year 2000
• BSD — Berkeley Software Distribution
• EPA — Environmental Protection Agency (US)
• MTBF — Mean Time Before Failure
• AAC — Advanced Audio Coding
• ADD — Addendum
• PCB — printed circuit board
• SLA — Service Level Agreement
• PUHU — Pick Up Hang Up
• WAN — Wide Area Network
• ARPA — Advanced Research Projects Agency (made early internet)
• DSA — Digital Signature Algorithm
• CIO — Chief Information Officer
• CAUCE — Coalition Against Unsolicited Commercial Email
• CR — Carriage Return
• CAE — Computer-Aided Engineering
• RFC — Request For Comment
• ACD — Automatic Call Distributor
• JV — Joint Venture
• ATCRBS — Air Traffic Control Radar Beacon System
• FAA — Federal Aviation Administration
• SWAG — Scientific Wild Ass Guess
• EC — European Commission
• UAV — Unmanned Aerial Vehicle
• DDL — Data Definition Language
• GPRS — General Packet Radio Service
• DB — Decibel
• HSD — High Speed Data
• RDBMS — Relational Database Management System
• EFF — Electronic Frontier Foundation
• ADM — Add/Drop Multiplexer
• AES — Auger Electron Spectroscopy
• GUI — Graphical User Interface (goo-ey)

• RAM — random-access memory
• SCC — Standards Council of Canada
• DMSP — Defense Meteorological Satellite Program (U.S.)
• AM — Amplitude Modulation
• SCSI — Small Computer System Interface
• TTYL — Talk To You Later (Internet Slang)
• EU — European Union (1994; formerly referred to as the EEC or EC)
• CCTV — Closed-circuit television
• RNC — Radio Network Controller
• GPS — Global Positioning System (ex-NAVSTAR)
• FX — Foreign Exchange
• WWW — World Weather Watch
• VHF — Very High Frequency
• NPV — Net Present Value {economics}
• ADR — Address
• DME — Distance Measuring Equipment
• ABR — Available Bit Rate
• EW — Electronic Warfare
• NIC — Network Interface Card
• AME — Amplitude Modulation Equivalent
• CPT — Carriage Paid To
• CIR — Committed Information Rate (Frame Relay)
• SD — Standard Deviation
• AOA — Angle Of Arrival
• NATO — North Atlantic Treaty Organisation
• CRT — Cathode Ray Tube (type of TV)
• DES — Data Encryption Standard
• CIS — Commonwealth of Independent States
• ICT — Information and Communication Technology
• ACL — Access Control List
• MOB — Mobile
• QMS — Quality Management System
• CCIS — Common Channel Interoffice Signaling
• CPM — Critical Path Method
• SME — Subject Matter Expert
• DHCP — Dynamic Host Configuration Protocol
• 100BASE-T2 — 100 Megabits per Second, Baseband, Two-pair Category 3 UTP cables
• AD — Active Directory
• ACK — Acknowledge (telecommunications; Cf. NAK)
• AC — Access Control
• NIH — Not Invented Here
• ASR — Airport Surveillance Radar
• VVX — Voice and Video eXchange
• TCB — Trusted Computing Base
• SLIP — Serial Line Interface Protocol
• NPI — New Product Introduction
• VR — Virtual Reality
• UPS — Ultraviolet Photoelectron Spectroscopy
• SDR — Special Drawing Rights
• CU — Control Unit

• EBCDIC — Extended Binary Coded Decimal Interchange Code (pronounced Eb-see-dik) (cf. BCD)
• JAXA — Japan Aerospace Exploration Agency
• USB — Universal Serial Bus
• QOS — Quality of Service
• DTE — Data Terminal Equipment
• BECN — Backward Explicit Congestion Notification
• SAS — Statistical Analysis System
• SQA — Software Quality Assurance
• AVHRR — Advanced Very High Resolution Radiometer  
• SLF — Super Low Frequency
• MSN — Microsoft Network
• TCP — Transmission Control Protocol
• TBD — To Be Determined
• ASK — amplitude shift keying
• PVT — Private
• RPC — Remote Procedure Call
• POS — Point Of Sale.Retail term, being the physical point at which products are displayed on shelves or paid for at the checkout, as in the EPOS acronym.
• RU — Are You?
• QI — Quality Improvement
• DTX — Discontinuous Transmission
• RM — Resource Management
• PO — Purchase Order
• WLTF — Wireless LAN (Local Area Network) Task Force
• PDN — Public Data Network
• PGP — Pretty Good Privacy (encryption)
• TNSTAAFL — There's No Such Thing As A Free Lunch
• SXS — Step-By-Step
• TC — Telephone Call
• DMTS — Distinguished Member Of Technical Staff
• EDS — Electronic Data Systems Corporation
• I/O — Input/Output
• ACM — Association for Computing Machinery
• ABET — Accreditation Board for Engineering and Technology, Inc.
• ATF — Advanced Tactical Fighter
• APIC — Advanced Programmable Interrupt Controller
• WAFB — Wireless Absolute Fairness Bound
• CBC — cipher block chaining
• MIS — Management Information System (OSHA)
• SP — Service Provider
• WB — Welcome Back
• DFS — Distributed File System
• B3ZS — bipolar 3-zero substitution
• ACE — Advanced Computing Environment
• BCC — Blind Carbon Copy
• RACON — Radar Beacon
• DNS — Domain Name System
• EMG — Electromyogram
• DOD — United States Department of Defense
• FFT — Fast Fourier Transform
• RPM — Revolutions Per Minute, (Rotations Per Minute)

• CB — Call Back
• IM — Instant Message
• GRE — Generic Routing Encapsulation
• DARPA — Defense Advanced Research Projects Agency (US)
• ENIAC — Electronic Numerical Integrator And Computer
• ATS — applications technology satellite
• ERP — Enterprise Resource Management
• IVR — Interactive Voice Response (telephone technology)
• CRL — Certificate Revocation List
• ISRO — Indian Space Research Organisation
• CC — Carbon Copy
• DRAM — Dynamic Random Access Memory (dee-ram) (computing)
• TAC — Technical Assistance Center
• CDR — Call-Detail Record
• CAD — Computer Aided Designer
• PNG — Portable Network Graphics (graphic file standard/extension)
• PM — Preventive Maintenance
• P&L — Profit and Loss statement
• CBT — Computer Based Training
• IETF — Internet Engineering Task Force
• CM — Configuration Management
• CMI — Computer Managed Instruction
• CU — See You
• FAQ — Frequently Asked Questions (sometimes Pronounced Fak)
• LEO — Low Earth Orbit (satellite communications)
• NYSE — New York Stock Exchange
• DC — Direct Current
• CFE — Contractor-Furnished Equipment
• ADPE — Automatic Data Processing Equipment
• EEC — European Economic Community (predecessor of the European Union|EU)
• DSS — Decision Support System
• UHF — Ultra High Frequency (300-3000 MHz; 1m-10cm)
• ATC — Air traffic control
• VTC — Video Teleconference
• IRLAN — Infrared LAN
• NMT — Nordic Mobile Telephone
• RFI — Request For Information. Sales department shorthand. Special priority when use in conjunction with RFN (see below).
• OMG — Object Management Group
• OCR — Optical Character Recognition
• NSF — National Sanitation Foundation
• AE — Account Executive
• SIG — Special Interest Group
• AGP — Accelerated Graphics Port
• EVP — Executive Vice President
• AAAI — American Association for Artificial Intelligence's
• MDA — Monochrome Display Adapter
• ATM — Adobe Type Manager
• Q&A — Question & Answer
• AP — Application Protocol
• AGC — Automatic Gain Control

• LCP — Link Control Protocol
• MAC — Message Authentication Code
• M — Meter
• VPN — Virtual Private Network (ATM)
• SEI — Software Engineering Institute
• PAR — Precision Approach Radar
• ISO — Infrared Space Observatory
• QA — Center for Quality Assurance in International Education
• COO — Chief Operation Officer
• SMS — Short Message Service
• O&M — Operation and Maintenance
• JIT — Just in time
• MTTR — Mean Time To Repair
• SDD — Software Design Document
• PLD — Programmable Logic Device
• SOW — Statement Of Work
• DMX — De-MultipleXer
• AE — Application Entity
• AF — Audio Frequency
• CIM — Corporate Information Management
• DOJ — Department of Justice (US)
• VIRUS — Vital Information Resources Under Siege
• NEC — National Electrical Code
• ACFQ — Absence Compensation Fair Queuing
• PLMN — Public Land Mobile Network
• SGML — Standard Generalized Markup Language
• DIT — Directory Information Tree
• CAM — computer aided manufacturing
• BS — Base Station
• EAP — Extensible Authentication Protocol
• ISDN — Integrated Services Digital Network
• OBO — Or Best Offer
• CAM — Computer-Aided Mapping
• BBS — Bulletin Board System
• POP — Point Of Presence (Internet)
• BBU — Baseband Unit
• IMPACT — Integrated Manufacturing Precision Assembly Cellular Technology
• BPRZ — Bipolar Return-to-Zero
• MIC — Message Integrity Check
• FCW — Federal Computer Week
• TOS — Type Of Service
• AMD — Advanced Micro Devices, Inc. (producer of computer chips)
• BST — British Summer Time
• DLC — Digital Loop Carrier
• ROI — Return on Investment
• ECO — Engineering Change Order
• BT — British Telecommunications
• PE — Polyethylene
• MOS — Model Output Statistics
• FDDI — Fiber Distributed Data Interface

• UAS — Unavailable Seconds
• EGA — Enhanced Graphics Adapter
• CRM — Customer Relationship Management
• FIPS — Federal Information Processing Standard
• DSA — Directory System Agent
• DLR — Design Layout Record
• OSS — Operational Support System
• AFC — Automatic Frequency Control
• HSDPA — High-Speed Downlink Packet Access
• MS — Mobile Station
• VDS — Variable Depth Sonar
• HDLC — High-Level Data Link Control
• DQE — Detective Quantum Efficiency
• TV — Television
• OSI — Open Systems Interconnection (iso Standard)
• ZIP — Zone Improvement Plan
• MS — Message Store
• LLC — Logical Link Control
• CIM — Common Information Model
• AT — Advanced Technology
• ARP — Address Resolution Protocol (ATM)
• NSA — National Security Agency
• ADF — Automatic Direction Finder
• RFI — Radio Frequency Interference
• TPDU — Transport Protocol Data Unit
• CW — Continuous Wave
• ICMP — Internet Control Message Protocol
• DSL — Digital Subscriber Line
• CIC — Circuit Identification Code
• Z — Zero
• QAM — quadrature amplitude modulation
• OSPF — Open Shortest Path First (ATM)
• BCD — Binary-Coded Decimal
• CLNP — ConnectionLess-mode Network Protocol
• RCU — Remote Control Unit
• CDS — Cell Directory Service
• PECVD — Plasma-Enhanced Chemical Vapor Deposition
• ISS — International Space Station
• MHS — Message Handling System (electronic)
• TM — Technical Manual
• LF — Low Frequency
• ME — Mobile Equipment
• ERT — Emergency Response Team
• CAA — Civil Aviation Authority
• RIP — Routing Information Protocol
• PMA — Physical Medium Attachment
• TS — Technical Specification
• CHAP — Challenge Handshake Authentication Protocol (ATM)
• DDE — Dynamic Data Exchange (in software parlance)
• JIS — Japanese Industrial Standard

• RAID — Redundant Array of Inexpensive Disks
• CUL — See You Later
• MF — Medium Frequency
• IS — Intermediate System
• MLS — Multiple Listing Service
• PC — Personal computer (host)
• CERT — Computer Emergency Response Team
• ERP — Enterprise Resource Planning
• RM — Regional Manager
• PAL — Programmable Array Logic
• AAAS — American Association for the Advancement of Science
• FC — Fibre Channel
• DCE — Distributed Computing Environment
• ADT — Abstract Data Type
• PDU — Protocol data unit (such as segment, packet, frame, etc.)
• RAD — Rapid Application Development
• AT — Access Tandem
• IW — Information Warfare
• JSC — Johnson Space Center (Houston, TX)
• DLL — Dynamic Link Library (computer file)
• BR — Branch
• EEPROM — Electrically Erasable Programmable Read-Only Memory
• CC — Call Control
• SQL — Structured Query Language
• SSM — Source-Specific Multicast
• NIST — National Institute of Standards and Technology
• ITU — International Telecommunication Union
• AADC — Automated Area Distribution Center
• IRS — U.S. Internal Revenue Service
• NA — Not Applicable
• PT — Project Team
• PERT — Program Evaluation and Review Technique
• GSA — U.S. General Services Administration
• ECN — Explicit Congestion Notification
• RCC — Rescue Coordination Center
• AML — Amplitude Modulated Link
• EDVAC — Electronic Discrete Variable Automatic Computer
• MPI — Message Passing Interface
• CBDS — Connectionless Broadband Data Service
• DQPSK — Differential Quadrature Phase-Shift Keying
• CDT — Central Daylight Time
• VM — Virtual Machine
• NAS — Network Access Server
• SEM — Space Environment Monitor
• PRI — Primary Rate Interface (ISDN)
• DT — DWDM (Dense Wavelength Division Multiplexing) Terminal
• HW — Hardware
• SAIC — Science Applications International Corporation
• DSTE — Digital Subscriber Terminal Equipment
• BPR — Business Process Re-engineering

• RFS — Request For Service
• PWD — Password
• FCA — Free Carrier
• HZ — cycles per second (hertz)
• UR — Your
• DTR — Data Terminal Ready
• AS — Autonomous System
• COQ — Cost Of Quality
• MVS — Multiple Virtual Storage
• VAC — Vacant
• WMAN — Wireless Metropolitan Area Network
• DPC — Destination Point Code
• YP — Yellow Pages
• LED — law enforcement desk; light emitting diode
• TLS — Transport Layer Security
• CS — Cable Select
• COO — Cost of Ownership
• COMJAM — Communications Jamming
• IDT — Integrated Digital Terminal
• W3C — World Wide Web Consortium
• DOS — Disk Operating System
• MHS — Microwave Humidity Sounder
• JPL — Jet Propulsion Laboratory (California Institute of Technology) (NASA)
• NMR — Nuclear Magnetic Resonance
• URI — Uniform Resource Identifier
• SOHO — Small Office Home Office
• KISS — Keep It Simple Stupid
• DOM — Document Object Model
• AMI — Advanced Metering Infrastructure
• CIA — Central Intelligence Agency
• VB — Visual Basic
• LSR — Local Service Request
• RDP — Radar Data Processing
• NESDIS — National Environmental Satellite, Data, and Information Service
• CLI — Command line Interface (Cabletron)
• STI — Speech Transmission Index
• APC — American Power Conversion
• BER — Bit-Error Rate
• RFO — Reason For Outage
• AR — Access Rate
• PSTN — Public Switched Telephone Network
• MS — Management System
• DMA — direct memory access (computer term)
• AQL — Acceptable Quality Level
• TBD — To Be Decided
• MS — Millisecond
• HF — High Frequency
• AMT — Amount
• LCN — Logical Channel Number
• OM — Old Man

• WYSIWYG — What You See Is What You Get (pronounced Wizzy-wig. See Entry For Derived Acronyms)
• OTN — Optical Transport Network
• IPX — Internetwork Packet Exchange
• BRA — Basic Rate Access
• WS — Workstation
• CMS — Content Management System
• OS — Operating System
• GB — Gigabyte
• ASP — Application Service Provider
• PRF — Pulse Repetition Frequency
• AFSK — Audio Frequency Shift Keying
• HVAC — Heating, Ventilation, and Air Conditioning
• CEV — Controlled Environment Vault
• SIL — Speech Interference Level
• AXE 10 — Series of electronic telephone exchanges from L.M. Ericsson
• SIC — Standard Industrial Classification (Code)
• NTIA — National Telecommunications and Information Administration
• NI — Network Interface
• HTTPS — HyperText Transfer Protocol Secure
• VOP — Voice Over Packet
• NOAA — National Oceanic and Atmospheric Administration (US)
• FA — Functional Area
• AMI — Alternate Mark Inversion
• ARPU — Average Revenue Per User
• LP — Low Pressure
• SA — Scientific American
• CABS — Carrier Access Billing System
• IS — International Standard
• USD — United States Dollar
• RPM — Resale Price Maintenance. The UK Net Book Agreement, as was. Means by which retail prices are controlled by primary suppliers. (Alternatively, Revolutions Per Minute, as in engine speed and 78, 33 and 45 records. In years to come how many people will know
• CMM — Capability Maturity Model
• PDS — Protected Distribution System
• BIS — Bureau of Indian Standards
• AEC — Architecture, Engineering, Construction
• EEG — Electro-EncephaloGram
• ISI — Inter-Symbol Interference
• OMS — Optical Multiplex Section
• E — Energy
• SNR — Signal-to-Noise Ratio
• VOD — Video On Demand
• RTS — Request To Send
• DIS — Distributed Interactive Simulation
• COM — Component Object Model
• UAN — Universal Access Number
• SVC — Scalable Video Coding
• ATSR — Along-Track Scanning Radiometer
• F — Fellow
• FXO — Foreign Exchange Office
• ASQC — American Society for Quality Control's
• DNIS — Dialed Number Identification Service

• CO — Certificate of Origin
• CTD — Cumulative Trauma Disorder
• NOTAM — Notice to Airmen
• PPB — parts per billion (109)
• PAN — Personal Area Network
• RACF — Resource Access Control Facility
• DSSS — Direct Sequence Spread Spectrum
• CATV — Community Antenna Television
• SBC — Southwestern Bell Corporation
• IEC — International Electrotechnical Commission
• TCO — Total Cost of Ownership
• CST — Central Standard Time (UTC-6 Hours)
• MC — Message Center
• CGI — Computer-Generated Imagery
• NTIS — National Technical Information Service Technology Administration
• TCP/IP — transmission control protocol/internet protocol
• EPR — Electron Paramagnetic Resonance
• CDMA — Code Division Multiple Access (voice/data transmission)
• ROFL — Rolling on the floor laughing
• CFO — Communication Filing Officer
• SM — Senior Member
• VOL — Volume
• ARA — Apple Remote Access
• UTC — Coordinated Universal Time
• ADC — Analog-Digital Converter
• NEMA — National Electric Manufacturer's Association
• SPC — Stored Program Control
• PCI — Peripheral Component Interconnect
• ZIP — Zone Information Protocol
• SEC — Software Engineering Center
• AIS — Alarm Indication Signal
• 3G — Third Generation mobile phone network
• FCS — Frame check sequence (Ethernet)
• DASD — Direct Access Storage Device
• IP — Intelligent Peripheral
• BSOD — Blue Screen Of Death
• PIN — Personal Identification Number
• ACR — Attenuation Crosstalk Ratio
• EAS — Extended Area Service
• AT&T — American Telephone and Telegraph (U.S. company, also known as "Ma Bell")
• BNSC — British National Space Centre
• AU — Audio Unit
• SCTP — Stream Control Transmission Protocol
• UL — Uplink
• ADN — Advanced Digital Network
• ITSEC — Information Technology Security Evaluation Criteria
• TNX — Thanks
• TB — Terabyte
• UA — User Agent
• TEC — Total Electron Content

• NTFS — New Technology File System
• ASR — Access Service Request
• MSR — Microwave Scanning Radiometer
• MSU — Microwave Sounding Unit
• DCN — Design Change Notification
• NLMS — Normalized Least Mean Square
• ECT — Explicit Call Transfer
• FCC — Federal Communications Commission (US)
• ISA — Industry Standard Architecture
• NIC — Network Information Center
• DTI — Department of Trade and Industry (UK)
• DCP — Design Change Package
• MSE — Mobile Subscriber Equipment
• LF — Line Feed
• LD — Long Distance
• MAC — Media Access Control
• CAC — Carrier Access Code
• WB — Write Back
• STP — Spanning Tree Protocol
• BRI — Basic Rate Interface
• ARPANET — ARPA Network
• ISBN — International Standard Book Number (ISO 2108)
• CT — Computer Telephony
• IN — Intelligent Network
• WG — Working Group
• MCSD — Microsoft Certified Solution Developer
• BYOD — Bring Your Own Device
• ASI — Asynchronous Serial Interface
• SPI — Service Provider Interface
• CA — Certificate Authority
• EPR — Ethylene-Propylene Rubber
• DMARC — Demarcation point
• DS — Digital Signal
• AT&T — American Telephone & Telegraph
• M — Management
• CIS — CompuServe Information Service
• BPS — bits per second
• SAE — Society of Automotive Engineers
• FR — Frame Relay
• LPC — Linear Predictive Coding
• ELINT — Electronic Intelligence Satellite
• MD — Mediation Device
• MP — Multilink Protocol
• SCP — Service Control Point
• DIBL — Drain-induced Barrier Lowering
• PBX — Private Branch eXchange (company phone system)
• RCV — Receive
• TOP — Technical Office Protocol
• ES — Errored Second
• FTTB — Fiber To The Building

• DA — Destination Address
• BACP — Bandwidth Allocation Control Protocol
• AFS — Andrew File System
• LPE — Liquid Phase Epitaxy
• HSS — Home Subscriber Server
• DCOM — Distributed Component Object Model
• FCP — Fibre Channel Protocol
• RH — Relative Humidity
• NIS — Network Information Service
• CG — Coast Guard
• VLF — Very Low Frequency
• VLL — Virtual Leased Line
• EOT — End Of Transmission
• CATV — Cable Television
• DCS — Digital Cross-connect System
• ISSN — International Standard Serial Number (ISO 3297)
• RT — Remote Terminal
• CAB — Conformity Assessment Body
• DVP — Digital Voice Privacy
• KHZ — kilohertz (1000 cycles per second)
• SNMP — Simple Network Management Protocol (ATM)
• DAP — Directory Access Protocol
• TG — Task Group
• NCS — National Communications System
• STM — Short Term Memory
• TRM — Technical Reference Model
• IIS — Internet Information Services
• PABX — private automatic branch exchange (telephone)
• PGA — Programmable Gate Array
• RTU — Remote Terminal Unit
• MDA — Model Driven Architecture
• UI — User Interface
• OSHA — Occupational Safety and Health Act (1970)
• HDML — Handheld Device Markup Language
• CAN — Campus Area Network
• AEW — Airborne Early Warning
• CRC — Contrôle de Redondance Cyclique (French: Cyclic Redundancy Check)
• SSL — Secure Socket Layer
• NLM — National Library of Medicine (National Institutes of Health)
• BGP — Border Gateway Protocol (routing protocol)
• 1000BASE-T — 1000 Megabits per Second, Baseband, Twisted Pair
• MDF — Main Distribution Frame
• RSVD — Reserved
• MRC — Monthly Recurring Charge
• RA — Risk Analysis
• IANA — Internet Assigned Numbers Authority
• SVP — Senior Vice President
• UN — United Narions
• RTN — Regional Telecommunication Network
• CAV — Constant Angular Velocity

• AFP — AppleTalk Filing Protocol
• EDD — Envelope Delay Distortion
• EPABX — Electronic Private Automatic Branch Exchange
• IP — Intellectual Property
• TCSEC — Trusted Computer System Evaluation Criteria
• AMLCD — Active Matrix Liquid Crystal Display
• ATN — Aeronautical Telecommunication Network
• BT — BlueTooth
• ESS — Electronic Switching System
• NBS — National Bureau of Standards (US)
• TE — Traffic Engineering
• SBU — Strategic Business Units
• GOS — Grade Of Service
• PD — Public Domain
• CTS — Clear To Send
• MCU — Multipoint Control Unit
• FASB — Financial Accounting Standards Board
• NRC — National Research Council (Canada)
• ASR — Automatic Speech Recognition
• P — Predicted
• AWG — American Wire Gauge
• ADEOS — ADvanced Earth Observing Satellite (Japan)
• SCM — Supply Chain Management
• EFT — Electronic Funds Transfer
• SML/SMS — Service Management Layer/Service Management Service
• SHA — Secure Hash Algorithm
• OPC — Originating Point Code
• CF — Compact Flash
• EMC — Electromagnetic Compatibility
• SPADATS — Space Detection And Tracking System
• SAN — System Area Network
• TWT — Traveling Wave Tube
• MME — Mobility Management Entity
• STP — Signal Transfer Point
• MTSO — Mobile Telephone Switching Office
• NMS — Network Management System
• JPEG — Joint Photographic Experts Group (24-bit image storage format)
• Y — Yttrium
• DSP — Digital Signal Processor
• ISAS — Institute of Space and Astronautical Sciences (Japan)
• WPS — Wireless Priority Service
• AVL — Available
• OAS — Organization of American States
• RFD — Request For Discussion
• TN — Telephone Number
• LZ — Landing Zone
• ADT — Atlantic Daylight Time (UTC-3 Hours)
• STK — Satellite Tool Kit
• BOC — Bell Operating Company
• SOAP — Simple Object Access Protocol

• ELF — Extremely Low Frequency
• PUB — Publication (file name extension)
• ANI — Automatic Number Identification (Caller ID)
• GDS — Global Distribution System
• C4 — Command, Control, Communications, and Computers
• MIPS — Millions of Instructions Per Second
• BS — Beam Splitter
• ASIC — application-specific integration circuit
• OLAP — Online Analytical Processing
• DUP — Duplicate
• SHF — Super High Frequency
• PM — Project Manager
• CSAT — Customer Satisfaction
• AAS — Adaptive Antenna System
• FUP — Fair Use Policy
• FE — Far End
• SVD — Singular Value Decomposition
• OC — Optical Carrier
• PSD — Phase-Sensitive Detector
• PVC — Permanent Virtual Circuit (ATM)
• B2C — Business-to-Consumer
• CORBA — Common Object Request Broker Architecture
• AOI — Area Of Interest
• DBS — Direct Broadcast Satellite
• BIP — Band Interleaved by Pixel
• EMR — Electromagnetic Radiation
• EDP — Electronic Data Processing Plc (London Stock Exchange [LSE])
• DID — direct inward dial
• BG — Background
• MMU — Memory Management Unit
• NIST — National Institute of Standards & Technology (US)
• PPP — Point-to-Point Protocol
• ROSAT — Roentgen Satellite
• MOL — Manned Orbiting Laboratory
• B2B — Business to Businesse
• FITS — Flexible Image Transport System
• IS — Information System
• SIT — Static Induction Transistor
• ACTV — Active
• SVC — Switched Virtual Connection
• SBC — Session Border Controller
• FCA — Free Carrier Absorption
• DDS — Digital Data Service
• MIB — Management Information Base (ATM)
• ADCCP — Advanced Data Communications Control Procedures
• JVM — Java Virtual Machine
• ESTEC — European Space Research and Technology Centre
• CCTA — Central Computer and Telecommunications Agency
• DX — Duplex
• CMT — Cadmium Mercury Telluride

• ECMA — European Computer Manufacturer's Association
• ECAC — European Civil Aviation Conference
• APPL — Application
• CSPRM — Common Signaling Protocols Resource Module
• ARC — Army Reuse Center
• EAC — Engineering Accreditation Commission
• DAL — Dedicated Access Line
• RSRQ — Reference Signal Received Quality
• DID — Digital Information Display
• BERT — Bit Error Rate Tester (telecommunication)
• BIOS — Basic Input Output System
• CNM — Customer Network Management
• YL — Young Lady
• ROS — Return on Sales
• LEP — Large Electron Positron
• LEN — Line Equipment Number
• SCN — Switched Circuit Network
• D-RAM — Dynamic Random Access Memory
• TO — Technical Order
• DSN — Deep Space Network - network of large antennas and communication facilities.
• PST — Pacific Standard Time (UTC-8 Hours)
• AMHS — Automated Message Handling System
• OSTP — Office of Science and Technology Policy
• CU — Channel Unit
• DEC — Decimal
• MTU — Maximum Transmission Unit
• EFS — Encrypting File System
• TE — Test Equipment
• MCD — Magnetic Circular Dichroism
• EISA — Extended Industry Standard Architecture
• OTS — Optical Transmission Section
• RT — Radiotelephone
• VC — Virtual Channel
• ATA — Analog Telephone Adapter
• DC — Disconnected
• Y — Yes
• AM — Activity Manager
• DCS — Digital Cross-Connect
• MCA — Micro Channel Architecture
• RARP — Reverse Address Resolution Protocol
• WWAN — Wireless Wide Area Network
• MIME — Multipurpose Internet Mail Extension
• 10BASE-T — 10 Megabits per second, Baseband, Twisted pair
• AIN — Advanced Intelligent Network
• SCADA — Supervisory Control And Data Aquisition
• YYP — Yahoo Yellow Pages
• STA — State
• ECP — Encryption Control Protocol
• PDS — Planetary Data System
• OLE — Object Linking and Embedding (Microsoft communication protocol)

• RDF — Radio Direction Finder
• TSR — Telecommunications Service Request
• LMS — Learning management system
• METRO — Metropolitan
• DUC — Digital Up-Converter
• SLP — Service Location Protocol
• PDC — Personal Digital Cellular
• ETS — European Telecommunication Standard
• WMO — World Meteorological Organization (ICSU)
• FTTH — Fiber To The Home
• APM — Advanced Power Management
• CCSD — command communications service designator; control communications service designator
• TLC — The Learning Channel
• AAF — Advanced Authoring Format
• DC — Display Controller
• FAX — Facsimile
• CBP — Coded Block Pattern
• RMS — root mean square (preferred over "RMS")
• BPDU — Bridge Protocol Data Unit
• EIP — Equipment installation procedure
• MOD — Modify
• ACT — Activity
• SL — Single Line
• SAR — Specific Absorption Rate
• VOIP — Voice Over IP (Internet Protocol)
• QPSK — aeronautical quadrature phase shift keying
• CB — Common Battery
• FAA — Federal Aviation Agency
• EX — Exercise
• NIC — Network Interface Controller
• ECP — Engineering Change Proposals
• SF — Single Frequency
• OAM&P — Operations, Administration, Maintenance & Provisioning
• CGM — Computer Graphics Metafile
• A — Anode
• DRM — Digital Rights Management
• TAG — Technical Advisory Group for Biological Control Agents of Weeds
• ASARS — Advanced Synthetic Aperture Radar System
• EDT — Eastern Daylight Time
• LU — Logical Unit
• E — Echo
• BUS — Business
• CIFS — Common Internet File System
• WTO — World Trade Organisation
• FR PVC — Frame Relay Permanent Virtual Connection
• AYT — Are You There
• ARIN — American Registry for Internet Numbers
• RT — Response Time
• ROTFL — Roll On The Floor Laughing
• PS — Product Specification

• ASQ — Alpha System Qualification
• CER — Cell Error Ratio
• IV — Initialization Vector
• CMP — Connection Management Protocol
• CG — Center of Gravity (DXS)
• NNM — Network Node Manager
• ARG — Argument
• FE — Finite Element
• SW — South West
• ECE — Economische Commissie voor Europa (United Nations) (Dutch: Economic Commission for Europe)
• TOS — Temporarily Out of Service
• DCN — Disconnect
• NAFTA — North American Free Trade Agreement
• DL — Digital Library
• DSLAM — Digital Subscriber Line Access Multiplexer (Module)
• APS — Automatic Protection Switching (SONET/SDH)
• NNTP — Network News Transfer Protocol
• VT — Vacuum Tube
• KM — Knowledge Management
• LDAP — Lightweight Directory Access Protocol (pronounced Ell-dap)
• ADL — Advanced Distributed Learning
• FDL — Facility Data Link
• WIPO — World Intellectual Property Organization
• PM — post meridian
• RAN — Radio Access Network
• PKI — Public Key Infrastructure (cryptography)
• CD — Critical Dimension
• EMS — Express Mail Service
• USGS — United States Geological Survey (DOI)
• RSN — Real Soon Now [which may be a long time coming]
• E&M — ear and mouth (special signaling leads)
• ICANN — Internet Corporation for Assigned Names and Numbers
• CFA — Carrier Facility Assignment
• ARINC — Aeronautical Radio Incorporated
• IRS — Interface Requirements Specification
• SD — Software Development
• Q — Quadrature
• BS — Broadcast Satellite
• CAPS — Call Attempts Per Second
• LLU — Local Loop Unbundling
• EEA — European Economic Area
• CMD — Command
• JST — Japan Standard Time
• OFC — Office
• 9 — Nine
• VGA — Video Graphics Array
• CHF — Swiss Franc
• PAP — Password Authentication Protocol (ATM)
• BTC — Botswana Telecommunications Corporation
• CDA — Command and Data Acquisition

• PE — Probable Error
• WAP — Wireless Application Protocol
• CSO — Customer Service Operations
• AS — Access System
• PTA — Pakistan Telecommunication Authority
• CS — Convergence Sublayer (ATM)
• CDC — Connected Device Configuration
• SRS — Software Requirements Specifications
• PPARC — Particle Physics and Astronomy Research Council
• UP — User Profile
• TI — Time Interval
• CRIS — Carrier Route Information System
• WPM — speech--words per minute
• TE — Terminal Equipment
• LQR — Linear Quadratic Regulator
• DID — data item description
• BSS — Basic Service Set
• SPGA — Staggered Pin Grid Array
• SAS — Special Access Surcharge
• CCD — Charge Coupled Device - a device for the movement of electrical charge.
• PMP — Project Management Professional
• BOD — Bandwidth on Demand
• PIC — Peripheral Interface Controller
• RJ-25 — Registered Jack type 25 (6-wire connector)
• PCMCIA — Personal Computer Memory Card International Association
• ECPA — Electronic Communications Privacy Act 1986
• AUD — Audit
• T&C — Terms & Conditions
• CO — Central Office
• CAM — Content Addressable Memory
• ACF — Access Control Field
• EAI — Enterprise Application Integration
• ITP — Interactive Telecommunications Program
• NOC — Network Operations Center
• TCM — Trellis-Coded Modulation
• WLAN — Wireless Local Area Network
• DTMF — Dual-Tone MultiFrequency
• PCM — Pulse-Code Modulation
• 100BASE-T4 — 100 Megabits per Second, Baseband, Four-pair Category 3 UTP cables
• IT — Integration Test
• RSVP — Resource Reservation Protocol (Internet)
• HTML — Hyper Text Markup Language
• AFM — Atomic Force Microscopy
• SATAN — Security Administrator Tool for Analyzing Networks
• ECR — Electronic Cash Register
• KB — Kilobyte: One thousand and twenty-four bytes kbps kilo bit per second
• BIU — Bus Interface Unit
• EMEA — Europe, Middle East and Africa
• DCS — Digital Cellular System
• CES — Consumer Electronics Show

• LT — Less Than
• ABN — Abnormal
• POTS — Plain Old Telephone Service (FCW)
• JAN — Joint Army-Navy
• 911 — Emergency Services Phone Number
• SPC — Statistical Process Control. Forerunning quality theory from the 1960s to TQC and TQM.
• CFD — computational fluid dynamics
• PG — Page
• TMS — Time Management System
• WPAN — Wireless Personal Area Network
• MIT — Massachusetts Institute of Technology (U.S.)
• VT — Virtual Terminal
• SUS — Suspension
• UPS — Uninterruptible Power Supply
• MX — Mixer
• VOA — Voice Of America
• SPM — Scanning Probe Microscope
• STP — standard temperature and pressure (0° and 1 atm)
• ECM — Electronic Counter Measures
• FAT — File Allocation Table
• NPA — Numbering Plan Area
• IRDA — Infrared Data Association
• PVD — Physical Vapor Deposition
• SML — Service Management Layer
• ACPI — Advanced Configuration and Power Interface
• DPL — Digital Power Line
• FEP — Front End Processor
• CAD — Computer-Aided Design
• IRS — Inertial Reference System
• 2W — Two Wire
• TTY — Teletype Telex Machine
• SIM — Subscriber Identity Module
• AIFF — Audio Interchange File Format
• TDOA — Time Difference Of Arrival
• FSK — Frequency-Shift Keying
• BSS — Base Station Subsystem
• ELT — Emergency Locator Transmitter
• CBWFQ — Class Based Weighted Fair Queueing
• RSS — Really Simple Syndication
• NA — Network Adapter
• CLM — Career Limiting Move. A reminder to think twice before embarking on any action that has an obvious whiff of disaster about it. (Ack R Gesling and S Phillips)
• VSAT — Very Small Aperture Terminal (satellite service)
• DOT — Department of Telecommunications (India)
• ACLR — Adjacent Channel Leakage Ratio
• SA — Source Address
• MGMT — Management
• SB — Switchboard
• TCR — Temperature Coefficient of Resistance
• DNIC — Data Network Identification Code
• BOFH — Bastard Operator From Hell

• B3G — Beyond Third Generation
• MAI — Multiple Access Interference
• EFIS — Electronic Flight Information System
• LEC — Local Exchange Carrier
• SZ — Seizure
• TSB — Telecommunication Standardization Bureau
• CFD — Call For Discussion
• BCH — Binary Coded Hexadecimal
• B6ZS — Bipolar 6 Zero Substitution
• SOGA — Share of Gross Adds
• EHF — Extremely High Frequency
• BAN — Base Area Network
• FRS — Family Radio Service
• GHZ — Gigahertz
• C — Cost
• PC — Peripheral Controller
• PDT — Portable Data Terminal
• NCSA — National Center for Supercomputing Applications
• NCSC — National Computer Security Center (NSA)
• RCS — Radar Cross Section
• ADF — automatic document feeder
• TLK — Talk
• EC — European Community
• ARQ — Automatic Repeat-reQuest
• ASEAN — Association of South East Asian Nations
• DDL — Digital Data Link
• CRO — Central Records Office
• IMSI — International Mobile Subscriber Identity
• 100BASE-T — 100 Megabits per second, Baseband, Twisted pair
• NES — Network Encryption System
• TOVS — TIROS Operational Vertical Sounder
• SDLC — Synchronous Data Link Control
• HEHO — Head End Hop Off
• ESF — Edge Spread Function
• RP — Reference Point
• ATC — Advanced Technology Center
• NTP — Network Time Protocol
• OSCAR — Orbiting Satellite Carrying Amateur Radio
• MV — Motion Vector
• SLV — Satellite-Launch Vehicle
• CB — Citizens' Band
• CTU — Central Terminal Unit
• MIDP — Mobile Information Device Profile
• FRS — Frame Relay Service
• CGA — Carrier Group Alarm
• TSE — Toronto Stock Exchange
• ISM — Industrial, Scientific and Medical
• SRM — Scalable Reliable Multicast
• SIL — Silence
• EM — Electromigration

• ACE — Adaptive Communication Environment
• BS — Backing Store
• WTLS — Wireless Transport Layer Security
• COPS — Common Open Policy Service
• BBM — Blackberry Messenger
• SPA — Software Publishers Association
• O/S — Operating System
• CAP — Capability
• TOA — Time Of Arrival
• PIM — Personal Information Manager
• SPX — Sequenced Packet Exchange
• EGP — Exterior Gateway Protocol
• CPC — Continous Packet Compression
• SMR — Specialized Mobile Radio
• EECM — End-to-End Call Manager
• CBR — Constant Bit Rate
• ODBC — Open Database Connectivity
• FWA — Fixed Wireless Access
• FEP — Front-End Processor
• CSC — Common Signaling Channel
• CS-PDU — Convergence Sublayer - Protocol Data Unit
• 2W — 2-Wire
• KAK — Key-Auto-Key
• SDH — Synchronous Digital Hierarchy (ATM)
• HDSL — High-bit-rate Digital Subscriber Line
• QDR — Quad Data Rate
• AIT — Automatic Identification Technology
• WINS — Windows Internet Name Service
• ASDE — Airport Surface Detection Equipment
• PM — Phase Modulation
• DAT — Digital Audio Tape
• PSS — Performance Support System
• CBEMA — Computer & Business Equipment Manufacturers Association
• CMC — Career Management Center
• VAS — Value Added Services
• ESP — Encapsulating Security Payload
• MBPS — Megabits per second
• SG — Signaling Gateway (IETF)
• DL — Data Link
• SDK — Software Development Kit (Microsoft)
• MDM — Mobile Device Management
• TAD — Telephone Answering Device
• CQA — Certified Quality Auditor
• TDM — Time Division Multiplexer
• PU — Physical Unit (IBM)
• FEC — Forward Error Correction
• VOC — Volatile Organic Compounds (air pollution)
• NSS — Network Switching Subsystem
• DTD — Document Type Definition (XML)
• ES — Emergency Service

• JCL — Job Control Language
• DS-0 — Digital Signal, Level 0
• PCI — Personal Computer Interface
• EMCON — Electromagnetic Emission Control
• ER — Extended Range
• PDN — Packet Data Network
• BJT — Bipolar Junction Transistor
• IMC — Intermediate Metal Conduit
• COM — Comedy Central
• ACAP — Application Configuration Access Protocol
• FAS — Frame Alignment Signal
• TTY — Text Teletype
• CFV — Call For Vote(s)
• IEC — Interexchange Carrier
• ADT — American District Telegraph Company
• VG — Voice Grade
• TDMA — Time Division Multiple Access
• RMI — Remote Method Invocation
• LASA — Large Aperture Seismic Array
• WAIS — Wide Area Information Server
• CGSA — Cellular Geographic Service Area
• BSA — Business Software Alliance
• AWACS — Airborne Warning And Control System
• EOB — End Of Business
• LD — Laser Diode
• CAM — Common Access Method
• COAX — Coaxial
• COMDEX — Computer Dealers Exposition
• PVC — Permanent Virtual Connection
• AOL — America on line
• NFPA — National Fire Protection Association
• DPL — Digital Private-Line
• MPEG — Motion Picture Experts Group
• DII — Dynamic Invocation Interface
• BFI — Brute Force and Ignorance. An expression found in everyday language since the early 1900s, meaning a heavy handed unrefined solution to a problem (especially fixing something - like bashing an electrical appliance to get it working again). In more recent
• ORB — Object Request Broker
• EU — End User
• EIGRP — Enhanced Interior Gateway Routing Protocol
• SQ — Service Quality
• E — Electra
• IEEE — Institute of Electrical and Electronics Engineers
• SLIC — Subscriber Line Interface Circuit
• JTF — Joint Task Force
• DCMI — Dublin Core Metadata Initiative (Online Computer Library Center)
• B-ISDN — Broadband Integrated Services Digital Network
• CPS — characters per second
• LATA — Local Access and Transport Area
• S/D — Source/Drain
• BA — Behaviour Aggregate
• ETF — Early Termination Fee

• BER — Basic Encoding Rules (ASN.1)
• DMS — Data Management System
• DDN — U.S. Defense Data Network
• DAP — Distributed Array Processor
• XPS — X-Ray Photoelectron Spectroscopy
• ADN — Abbreviated Dialing Number
• DMI — Distributed Management Interface
• P — Priority
• MTS — Message Transfer System
• FLM — First Line Maintenance
• MPLS — Multi Protocol Label Switching
• DN — Distinguished Name
• STD — Subscriber Trunk Dialing
• WHT — Walsh-Hadamard Transform
• PEM — Privacy-Enhanced Mail
• CDE — Common Desktop Environment
• SN — Stock Number
• DNS — Domain Name Service
• DER — Distinguished Encoding Rules
• SIA — Securities Industry Association
• AP — access point
• HEX — Hexadecimal (base 16)
• DCE — Data Communication Equipment
• SD — Speed Dial
• CVR — Crystal Video Receiver
• IRC — International Record Carrier
• IESG — Internet Engineering Steering Group
• VXML — Voice eXtensible Markup Language
• FOSE — Federal Office Systems Exposition
• AC — Area Code
• IPS — InPlane Switching
• DII — Defense Information Infrastructure
• PROM — Programmable Read-Only Memory
• SSRC — Synchronization Source
• TAM — Telephone Answering Machine
• WE — Western Electric
• SDU — Signal Distribution Unit
• BSS — Base Station System
• AFOSR — Air Force Office Of Scientific Research(USA)
• TKIP — Temporal Key Integrity Protocol
• SPIN — Service Provider Identification Number
• VMS — Virtual Memory System
• SWAP — Shared Wireless Access Protocol
• EIA — Extended Interaction Amplifier
• NIMBY — Not In My Back Yard
• IMP — Interface Message Processor
• CSPDN — Circuit Switched Public Data Network
• BIS — Business Information System
• HFC — Hybrid Fiber/Coaxial network
• DPDU — Data Protocol Data Unit

• VBR — Variable Bit Rate (ATM)
• ISAKMP — Internet Security Association and Key Management Protocol
• GMRS — General Mobile Radio Service
• RNX — Restricted Numeric eXchange
• YAHOO — You Are Hazy Over Oranges
• DGPT — Directorate General of Posts and Telecommunications
• IOC — Inter-Office Channel
• BMS — Business Management System
• MH — Message Handler
• ISOC — Internet Society
• CT — Computer Terminal
• FTTC — Fiber To The Curb光纤到路边
• ADB — Apple Desktop Bus
• ASA — Acoustical Society of America
• IMEI — International Mobile Equipment Identity
• AP — Action Point
• ACT — ACTIVITY, ACTIVITIES
• APN — An Access Point Name
• VF — Voice Frequency
• JRE — Java Runtime Environment
• CS — Central Station
• TDD — Time Division Duplex
• OTA — Office of Technology Assessment (U.S.; abolished by Congress, Fall 1995)
• LISP — List Processing Language
• CPN — Cisco Powered Network
• CP — Call Processing
• CI — Common Interface
• SAR — synthetic aperture radar (satellite)
• RCC — Radio Common Carrier
• BMEWS — Ballistic Missile Early Warning System (bee-mews)
• FH — Frequency Hopping
• WDN — Wireless Developer Network
• FITL — Fiber-In-The-Loop
• CE — Channel Element
• MBWA — Mobile Broadband Wireless Access
• DDD — Direct Distance Dialing
• SN — Service Number
• IPS — Instructions Per Second
• 3GPP — Third Generation Partnership Project
• SM — Service Module
• AIF — Audio Interchange Format
• ADC — Administration Center
• FDTD — Finite Difference Time Domain
• MLP — Mobile Location Protocol
• BTAM — Basic Telecommunications Access Method
• CIS — Computer and Information Science
• TRS — Telecommunications Relay Service
• IAT — Integrated Access Terminal
• DVB — Digital Video Broadcasting
• 1FB — Single line, Flat Business rate;

• AN — Access Node
• FXS — Foreign Exchange Subscriber
• CGA — Color Graphics Adapter
• DTN — Data Transfer Network
• CP — Change Proposal
• BHCA — Busy Hour Call Attempt
• RRN — Routing Recording Number
• LRC — Learning Resource Center
• DSS — Digital Signature Standard
• FEXT — Far-End Cross Talk
• OTDOA — Observed Time Difference of Arrival
• CIP — Carrier Identification Parameter
• MA — Maintenance Action
• CAL — Calorie
• RADIUS — Remote Authentication Dial-In User Service
• COMINT — Communications Intelligence
• DC — Device Control
• WAYP — White and Yellow Pages
• IRQ — Interrupt Request
• RQMT — Requirement
• RTC — Real-Time Control
• SRR — Search and Rescue Region
• LNP — Local Number Portability
• TEL — Telephone
• GDM — GSM (Global System for Mobile communications) Data Module
• RDS — Rate Determining Step
• OSP — Outside Plant
• NRPB — National Radiological Protection Board
• EST — Establish
• AWT — Agence Wallonne des Télécommunications
• DM — Domain Model
• SSM — Synchronization Status Message
• NCP — Network Control Protocol
• SPD — Serial Presence Detect
• TUR — Trunk Utilization Report
• ACP — Access Control Point
• ALT — Accelerated Life Test
• TELECOMMUTE — Telecommuting
• TAX — Trunk Automatic Exchange
• T — Temperature
• KDC — Kerberos Key Distribution Center
• AAV — Accountholder Authentication Value
• VLSI — Very-Large-Scale Integration
• AMSS — Automatic Message Switching System
• TSO — Telecommunications Service Order
• VPI — Virtual Path Identifier
• SCU — System Control Unit
• PP — Polypropylene
• OSS — Operations Support System
• COO — Cell of Origin

• TL1 — Transaction Language 1
• IAB — Internet Architecture Board
• ASD — Alternative Service Delivery
• ADP — Automatic Data Processor
• IRTF — Internet Research Task Force
• AMPS — Advanced Mobile Phone Service (cellular phone standard)
• C — Collector
• V — Variable
• DSN — Defense Switched Network
• DHD — Dial Home Device
• FRAD — Frame Relay Access Device
• TFTP — Trivial File Transfer Protocol (ATM)
• DL — Definition List
• EMR — Electromechanical Relay
• WAR — Weekly Activity Report
• SAF — System Access Fee
• BSI — British Standards Institution
• CONUS — Contiguous United States
• BCH — Bose-Chaudhuri-Hocquenghem Coding
• GBT — Ground Based Tower
• TRS — Trunked Radio Systems
• VTS — Vessel Traffic Service
• DCA — Dynamic Channel Assignment
• NIU — Network Interface Unit
• SIL — Solid Immersion Lens
• SKU — Stockkeeping Unit
• DPSK — Differential Phase Shift Keying
• SMB — Server Message Block
• E — Echo Time Zone
• NAT — Network Address Translation
• HLR — Home Location Register
• DUA — Directory User Agent
• NSAI — National Standards Authority of Ireland
• NDVI — Normalized Difference Vegetation Index
• PET — positron emission tomography
• SSM — Spread Spectrum Modulation
• UML — Unified Modeling Language (Object Management Group, OMG)
• DDU — Disk Drive Unit
• SDM — Service Delivery Management
• MC — Maintenance Control
• AVR — Automated Voice Response
• RDI — Remote Defect Indicator (UNI Fault Management)
• OOP — Object-Oriented Programming
• TCIC — Trunk Circuit Identification Code
• DEMUX — Demultiplexer
• ACC — Area Control Center
• DCS — Data Collection System (NOAA Polar Orbiting Satellites)
• ATS — Automatic Transfer Switch
• QI — Quality Indicator
• RAU — Remote Access Unit

• JDK — Java Development Kit
• NOAO — National Optical Astronomy Observatories (Tucson, AZ)
• RSL — Restricted Service License
• LOO — Likelihood of Occurrence
• OML — Object Model Library
• ABM — Asynchronous Balanced Mode
• ET — Electronic Transmission
• RJE — Remote Job Entry
• MPI — Minimum Picture Interval
• SNA — System Network Architecture
• ACSE — Association Control Service Element
• CNG — comfort noise generation
• NAK — Negative Acknowledge
• MLM — Multi-Longitudinal Mode
• COT — Central Office Terminal
• BELLCORE — Bell Communications Research, Inc.
• OT — Office of Telecommunications
• APDU — Application Protocol Data Units
• RACH — Random Access Channel
• TC — Transmission Convergence (ATM)
• RISC — Reduced Instruction Set Computing
• TIA — Telecommunications Industry Association
• DIS — Draft International Standard
• EDC — Electronic Dispersion Compensator
• NF — Noise Factor
• CND — Calling Number Display
• DDCMP — Digital Data Communications Message Protocol
• AOS — Alternate Operator Service
• CRLF — Carriage-Return Line-Feed
• CIAC — Computer Incident Advisory Capability
• SITA — Société Internationale de Télécommunications Aéronautiques
• EULA — End User License Agreement (usually in reference to software)
• CMRS — Commercial Mobile Radio Service
• DPCM — differential pulse code modulation
• ST — Such That
• POP — Post Office Protocol
• PAM — Payload Assist Module
• CIP — Channel Interface Processor
• CDM — Conceptual Data Model
• POE — power over ethernetinjector
• BOSS — Binary Object Storage System
• CMIP — Common Management Information Protocol (ATM)
• DM — Differential Mode
• SOS — Save Our Souls (Help!)
• CRTS — Cellular Radio Telecommunications Service
• CAMA — Centralized Automatic Message Accounting
• EIR — Equipment Identity Register
• IPM — Inches Per Minute
• ITT — Invitation To Tender
• RMS — Resource Management System

• VBA — Visual BASIC for Applications
• HSPA — High Speed Packet Access
• ALB — Analog Loopback
• AMPS — Advanced Mobile Phone System
• CRBT — Caller Ring Back Tone
• NE — North-East
• BLER — Block Error Rate
• DTI — Digital Trunk Interface
• 2G — Second Generation Wireless Systems
• LIF — Logical Interchange Format
• PMT — Program Management Team
• CCIR — International Radio Consultative Committee (French Acronym)
• SIM — Subscriber Identification Module
• SMDS — Switched Multimegabit Data Service (ATM)
• DSI — Digital Speech Interpolation
• LS — Loop Start
• TTY — teletype terminal
• CIRC — Cross-Interleaved Reed-Solomon Code
• EA — Extended Address Field Bit
• DVMRP — Distance Vector Multicast Routing Protocol
• ILD — International Long Distance
• EMS — Element Management System (ATM)
• SDP — Software Development Plan
• MCC — Mission Control Center (JSC)
• SVC — Switched Virtual Circuit (ATM)
• EBIC — Electron Beam Induced Current
• LANE — Local Area Network Emulation
• LSI — Large Scale Integration -> VLSI
• FOD — Fax on Demand
• DDI — Direct Dialing Incoming
• FGD — Feature Group D
• FMC — Fixed Mobile Convergence "Mobile UC or Unified Communications over Wireless"
• FAC — Forced Authorization Code
• TXM — Transmission X-ray Microscope
• ISG — Information Systems Group
• LRC — Longitudinal Redundancy Check
• EBCDIC — Extended Binary-Coded Decimal Interchange Code
• 3-D — 3-Dimensional
• VLAN — Virtual Local Area Network
• PACS — Personal Access Communications System
• ARSR — Air Route Surveillance Radar
• ILEC — Incumbent Local Exchange Carrier
• EBS — Electron Bombarded Silicon
• RAU — Radio Access Unit (Army)
• DTAP — Direct Transfer Application Process
• CLETS — California Law Enforcement Telecommunication System
• CLK — Clock
• CCNA — Cisco Certified Network Associated
• SCPC — single channel per carrier
• 4GL — Fourth-Generation Language

• MP — Modulation Parameter
• RXQUAL — Received Signal Quality
• FDD — Frequency Division Duplex
• FCA — Fixed Channel Allocation
• IG — Interface Group
• REPT — Report
• EMI — Electro-Magnetic Interference
• LDN — Local Directory Number
• CAC — Connection Admission Control (Asynchronous Transfer Mode)
• ACA — Adaptive Channel Allocation
• IAD — Integrated Access Device
• DSCP — Differentiated Services Code Point
• BLOS — Beyond Line-Of-Sight
• UART — Universal Asynchronous Receiver/Transmitter
• CODEC — Coder/decoder
• CPG — Converged Packet Gateway
• MA — Message Analysis
• AF — Assured Forwarding
• ARM — Asynchronous Response Mode
• FGA — Feature Group A
• INSAT — Indian National Satellite
• NTDS — Naval Tactical Data System
• HSCSD — High-Speed Circuit-Switched Data
• 3G — 3rd Generation Wireless Format
• RMON — Remote Monitoring
• NAS — Network-Attached Storage
• L2TPV3 — Layer 2 Tunneling Protocol Version 3
• UMA — Unlicensed Mobile Access
• CALEA — Communications Assistance for Law Enforcement Act
• GI — Graded-Index
• CRV — Call Reference Value
• DISN — Defense Information Systems Network
• FECN — Forward Explicit Congestion Notification (ATM)
• CRB — Cramer-Rao Bound
• ICL — Inserted Connection Loss
• DLP — Data Link Processor
• UDP — Up Down Pair
• MSW — Most Significant Word
• SSN — Switched Service Network
• BAN — Building Area Network
• CPS — Cycles Per Second (now Hertz)
• ASAR — Advanced Synthetic Aperture Radar 
• AWG — arrayed waveguide grating
• VPA — Valid Peripheral Address
• CAVE — Cellular Authentication and Voice Encryption Algorithm
• FNN — Full National Number
• ADC — Access Deficit Charge
• MCP — Microsoft Certified Professional
• RPV — Remotely Piloted Vehicle
• OMA — Open Mobile Alliance

• ALOC — Average Length Of Call
• DPT — Dynamic Packet Transport
• FDI — Feeder Distribution Interface
• LSW — Least Significant Word
• ALI — Automatic Location Information
• KSU — Key Service Unit
• IDF — Independent Distribution Frame
• OD — Outside Diameter
• RDT — Recall Dial Tone
• FEA — Finite Element Analysis
• CMA — Communications Management Association
• MHO — My Humble Opinion
• GAN — Global Area Network
• ASN.1 — Abstract Syntax Notation 1
• LPD — Low Probability of Detection
• BSC — Bi-Synchronous Communications
• RSS — Radio Service Software (Motorola)
• CIC — Carrier Identification Code
• CICS — Customer Information Control System (IBM Mainframe Software; Kicks Or C-I-C-S)
• INE — Intelligent Network Element
• MIS — Management Information Service
• WSDL — Web Services Description Language
• YABA — Yet Another Bloody Acronym
• CPC — Calling Party Control
• TT — Text-Telephone
• NII — National Information Infrastructure (USA)
• BOM — Bit-Oriented Message
• CCR — Customer Controlled Reconfiguration (Sprint)
• ASYNC — Asynchronous
• CLDC — Connected Limited Device Configuration
• TCB — Telecommunication Certification Body
• ASTD — American Society of Training and Development (Alexandria, Virginia)
• ECM — Error Correction Model
• EVA — Electronic Video Agent
• TOP — technical/office protocol
• OMF — Object Management Framework
• COC — Central Office Connection
• CCCH — Common Control Channel
• VN — Virtual Network
• SIP — Session Initiation Protocol
• TOMS — Total Ozone Mapping Spectrometer (satellite Instrument)
• DRFM — Digital Radio-Frequency Memory
• CTI — Computer Telephony Integration
• LCR — Least Cost Routing
• SDSL — Symmetric Digital Subscriber Line
• SISIR — Singapore Institute of Standards and Industrial Research
• RICK — Repeater Interface Communications Kit
• ASN.1 — Abstract Syntax Notation One
• EMF — Event Management Framework
• NREN — National Research and Education Network

• CNG — Fax Calling Tone
• CMOS — Complementary Metal Oxide Semiconductors
• TEI — Terminal Endpoint Identifier
• SWBD — Switchboard
• LDP — Label Distribution Protocol
• CHTML — Compact Hypertext Markup Language
• 4W — Four-Wire
• AAS — advanced automation system (FAA)
• AAL5 — ATM (Asynchronous Transmission Mode) Adaptation Layer 5
• ISI — Intersymbol Interference
• NCF — Network Control Facility
• LT — Line Termination
• IR — International Roaming
• SMPTE — Society of Motion Picture and Television Engineers, Inc.
• SLAM — Scanning Laser Acoustic Microscope
• TDD — Telecommunications Device for the Deaf
• PLL — Phase Locked Loop
• INTELSAT — International Telecommunications Satellite
• ISO — Independent System Operator (US) (see also TSO) Responsible for grid management, but does not own assets. (electricity)
• RSS — root-sum-square
• SN — Switching Network
• VHSIC — Very High-Speed Integrated Circuit
• DISA — U.S. Defense Information Systems Agency
• DXC — Digital Cross Connect
• WTS — Wireless Telecommunications Symposium
• VESA — Video Electronics Standards Association
• EDFA — Erbium-Doped Fiber Amplifier
• ACF — Advanced Communications Function (IBM)
• OSF — Open Software Foundation
• BIS — Brought Into Service
• DCAS — Downloadable Conditional Access System
• CFNRY — Call Forwarding on No Reply
• WARC — World Administrative Radio Conference
• DARTS — Design Approach for Real-Time Systems
• PSN — Packet Switched Network
• NC — Network Channel
• TCA — Threshold Crossing Alert
• FMR — Follow Me Roaming
• SE — Southeast
• IPVX — Internet Protocol version X
• SMS — Service Management System
• MR — Mobile Router
• AUI — Attachment Unit Interface
• PDL — Positioning Data Link
• CCP — Compression Control Protocol
• VPWS — Virtual Private Wire Service
• ESCA — photoelectron spectroscopy for chemical analysis
• WVOIP — Wireless Voice over Internet Protocol
• TD — Transmit Data
• WORM — Write-Once, Read-Many

• CACH — Call Appearance Call Handling
• FSK — Frequency Shift Keying
• IRF — Impulse Response Function
• 1-ESS — x-ESS series of Electronic Switching Systems
• UMTS — Universal Mobile Telecommunications Service
• 4G — Fourth Generation Wireless Systems
• TIFF — Tag Image File Format
• EEROM — Electronically Erasable Read-Only Memory
• CV — Coding Violation
• FC — Frame Control
• MGC — Multimedia Gateway Controller
• VRML — Virtual Reality Modeling Language
• IEEE-CS — Institute of Electrical and Electronics Engineers Computer Society
• BCDIC — Binary Coded Decimal Interchange Code
• ABBR — Abbreviation
• VSAM — Virtual Storage Access Method
• RDBMS — Relational Data Base Management System (Oracle)
• UAT — Universal Access Transceiver
• DAC — Digital-To-Analog Converter
• CIP — Continuous Improvement Program
• OBC — Onboard Computer
• PTP — Point to Point Transmission Service (electricity)
• TCP/IP — Transmission Control/Internet Protocol
• NRP — Network Resource Planning
• NDS — Novell Directory Services
• VSAT — Very Small-Aperture Terminal
• SDP — Session Description Protocol
• BT — Burst Tolerance
• AMR — Automated meter reading also known as Automatic Meter Reading
• MSDP — Multicast Source Discovery Protocol
• RGN — Region
• SCR — Sustainable Cell Rate
• PNP — Plug-and-Play
• ATS — Abstract Test Suite
• IMAP — Internet Mail Access Protocol
• DACS — Digital Access Cross-connect System
• ULL — Unbundled Local Loop
• FTAM — File Transfer Access and Management
• TTYL — Type To You Later
• TU — Transmission Unit
• USA — Underground Service Alert
• DLCI — data link connection identifier
• STN — Station
• WFA — Wait for Answer
• RCP — Right-Hand Circular Polarization
• MSRN — Mobile Station Roaming Number
• 2G — Second generation cellular
• SYM — Symmetric
• DOD — Direct Outward Dialing
• RX — Receive

• VTAM — Virtual Telecommunication Access Method
• FOIP — Fax Over Internet Protocol
• SRL — Singing Return Loss
• CSA — Canadian Standards Association (like UL)
• B2B — Business-to-Business
• CC — Country Code
• ESCON — Enterprise System Connection
• LIS — Lightning Imaging Sensor
• SSMA — Spread-Spectrum Multiple Access
• DTU — Data Transfer Unit
• FI — Format Identifier
• MAJ — Major
• DNSIX — Defense Network Security Information Exchange
• 3G — Third Generation (mobile communication system)
• PUK — PIN (Personal Identification Number) Unlocking Key
• MMDS — Multichannel Multipoint Distribution Service
• RDMA — Remote Direct Memory Access
• SONET — Synchronous Optical Network
• DA — deca
• RCU — Radio Control Unit
• LB — Local Battery
• LH — Link Handler
• VLSI — Very Large-Scale Integration
• ANC — Access Network Controller
• CON — Concentrator
• ANSI-41 — ANSI standard for mobile management
• CCNA — Cisco Certified Network Administrator
• FPS — Framing Pattern Sequence
• CODASYL — COnference on DAta SYstems Languages
• DPA — Distributed-Power Architecture
• ADM — Administration Building
• ETN — Electronic Tandem Network
• 3GPP — Third-Generation Partnership Project
• DFG — difference-frequency generation
• ERL — Echo Return Loss
• FSAI — Fiber Serving Area Interface
• F — Frequency
• VCI — Virtual Channel Identifier
• IPCP — Internet Protocol Control Protocol
• CSU — Channel Service Unit
• ATS — Air Traffic Services
• IEEE-SA — Institute of Electrical and Electronics Engineers - Standards Association
• SETI — Search for Extraterrestrial Intelligence
• NCC — Network Control Center (GSFC)
• ASE — Application Service Element
• LFACS — Loop Facility Assignment and Control System
• WDA — Wireless Digital Assistant
• CID — Craft Interface Device
• DPDT — Double-Pole Double-Throw
• PARC — Palo Alto Research Center

• TACSAT — Tactical Satellite
• DCF — Distributed Coordination Function
• ESPN — Entertainment and Sports Programming Network
• MF — Multiple Frequency
• BY — Busy
• DXF — Data Exchange Format
• CPE — Customer Premise Equipment
• DTE — Digital Terminal Equipment
• NCAR — National Center for Atmospheric Research (US)
• TBCD — Telephony Binary Coded Decimal
• MMM — Mobile Media Mode
• PBT — Polybutylene Terephthalate
• VCC — Virtual Channel Connection (ATM)
• PTT — Push to Talk Technology
• DIV — Divisionsion
• STMR — Sidetone Masking Rating (telecommunications)
• RADIUS — Remote Authentication dial In User Service
• TLT — Test Loop Translator
• CRS — Cell Relay Service
• CPH — Call Party Handling
• GBPS — Gigabits per second
• CAR — committed access rate
• VSM — Vestigial Sideband Modulation
• FTTK — Fibre To The Kerb
• GSM — Groupe Speciale Mobile
• RDT — Remote Digital Terminal
• WSFL — Web Services Flow Language
• DIL — Direct Inward Line
• PD — Pulse Duration
• RECON — Reconnaissance
• BNC — Bayonet Neill-Concelman
• LAG — Link Aggregation Group
• LI — Length Indicator
• IPLC — International Private Leased Circuit
• EGSM — Extended Global System for Mobile Communications
• L2TP — Layer 2 Tunneling Protocol
• PIC — Programmable Interrupt Controller
• DAS — Data Acquisition System
• CPAP — Customer Premises Access Profile
• CC — Composite Clock (SONET)
• DTL — Defense Telephone Link
• CTIA — Cellular Telecommunications Industry Association
• ELFEXT — Equal-Level Far-End Cross-Talk
• LCF — Location Confirm
• YA — Yet Another
• OMP — Open Management Platform
• OSA — Open System Architecture
• RLU — Remote Line Unit
• BATM — Basic Telecommunication Access Method
• CTO — Commonwealth Telecommunications Organisation

• CSR — Customer Service Report
• TBPS — Terabits Per Second
• DQDB — Distributed Queue Dual Bus
• CSIRO — Commonwealth Scientific and Industrial Research Organization
• TDWR — Terminal Doppler Weather Radar
• 4WAI — Four-Wire Analog Interface
• SCM — Single-Carrier Modulation
• FCA — Free Carrier Alongside
• GS — Ground Start
• CRBT — Color Ring Back Tone
• SCCS — Switching Control Center System
• LIDB — Line Information DataBase
• SS1 — Signalling System 1 (500/20 Hz tones)
• MFC — Multi-Frequency Code
• DPBX — Digital Private Branch Exchange
• DLL — Digital Local Line
• PCCA — Portable Computer Communications Association
• UPT — Universal Personal Telecommunications
• CPOP — Circuit Precedence Over Packet data
• VR — Virtual Router
• CVD — Chemical Vapor Deposition
• VOB — Versioned Object Base
• VDR — Voice Digitization Rate
• USF — Universal Service Fund
• RP — Radio Port
• ADPC — Automatic Data Processing Center
• DE — Discard Eligibility (ATM)
• TP — Telephone Pole
• GDK — GIMP (GNU Image Manipulation Program) Drawing Kit
• SIMT — Système interbancaire marocain de télécompensation
• ACF — Access Coordination Function
• CLD — Cross-Layer Design
• EMS — Enhanced Messaging Service
• BUFR — Binary Universal Form for the Representation (of data)
• TDRSS — Tracking and Data Relay Satellite System
• AMA — automatic message accounting
• WAE — Wireless Application Environment
• SCR — System Change Request
• VPX — Virtual Path Cross-Connect
• FDOA — Frequency Difference Of Arrival
• AT — Attenuation
• MTD — Moving Target Detection
• HTML — Hyper-Text Markup Language
• BAF — Bellcore AMA (Automatic Message Accounting) Format
• SPID — Service Profile Identifier
• CLCC — Ceramic Leaded Chip Carrier
• ESN — Electronic Serial Number
• EM — Element Manager
• PTP — Point To point Protocol
• PDSO — Packet Data Security Overlay

• SAT — Satellite
• SMI — Structure of Management Information
• VOB — Voice Over Broadband
• 4 GIG — 4 Giga Intellectual Gadget
• ET — Exchange Terminal
• PSDN — Public Switched Digital Network
• VNS — Virtual Network System
• EFCI — Explicit Forward Congestion Indication (ATM)
• ARFA — Allied Radio Frequency Agency
• LCP — Local Control Point
• LIM — Line Isolation Monitor
• GERAN — GSM (Global System for Mobile communications) Edge Radio Access Network
• WK — Week
• MTA — Message Transfer Agents (Internet)
• DMT — Discrete Multi-Tone Technology
• DSSSL — Document Style Semantics and Specification Language
• CAPTAIN — Character And Pattern Telephone Access Information Network
• DW — Deep Water
• WNMS — Wireless Network Management System
• TCC — Transmission Control Code
• RFR — Radio Frequency Radiation
• DRQ — Disengage Request
• EDSX — Electronic Digital Signal Cross-Connect
• BSA — Basic Service Area
• ADCCP — Advanced Data Communication Control Procedures
• TP — Termination Point
• WIN — Wireless Intelligent Network
• WSA — Wireless Security Auditor
• TACACS — Terminal Access Controller Access Control System
• CCITT — Comit? Consultatif International T?l?graphique et T?l?phonique
• TP — Transition Point
• HFC — Hybrid Fiber Coaxial
• MTI — Moving Target Indicator
• TTL — ToS and Time-to-Live
• TNI — Telephone Network Interface
• LRM — Long Reach Multimode
• FMS — Fixed Mobile Substitution
• IWF — Interworking Function
• TSC — Test System Controller
• SSP — Security Service Provider
• DOCSIS — Data over Cable Service Interface Specification
• IPRC — Intellectual Property Rights Committee
• SSAP — Source Service Access Point
• ECS — Environmental Control System (Subsystem)
• SCH — Synchronization Channel
• CTE — Computer Telephony Engineer
• CES — Circuit Emulation Service
• COFA — Change Of Frame Alignment
• PLCP — Physical Layer Convergence Procedure
• ENV — Environment

• MGCP — Multimedia Gateway Control Protocol
• MITI — Ministry of International Trade and Industry
• OWS — Operator Work Station
• SPA — Special Prorate Agreement
• FTTP — Fiber To The Premises
• QS — Quasi-Synchronous
• UCF — Unregistration Confirm
• RIPE NCC — Reseaux IP Europeens Network Coordination Centre
• FIOS — Fiber Optic Services
• PLE — Path Length Efficiency
• TRMM — Tropical Rainfall Measuring Mission (US-Japan)
• BDE — Borland Database Engine
• LLA — Link Level Access
• TM — Thematic Mapper (Landsat)
• MMSI — Maritime Mobile Service Identity
• CDV — Cell Delay Variation(ATM)
• DICOM — Digital Imaging and Communications in Medicine
• NCP — Network Control Program
• FAT — Final Acceptance Testing
• PJC — Pointer Justification Count
• DAC — Digital to Analog Converter-Audio
• ECS — Encryption Control Signal
• CDM — Configuration Data Manager
• LCAS — Link Capacity Adjustment Scheme
• TCM — Time Compression Multiplexer
• URN — Uniform Resource Namespace
• IBSS — Independent Basic Service Set
• NWK — Network
• WCDMA — Wideband Code Division Multiple Access
• DMS — Defense Messaging System
• BASIZE — Buffer Allocation Size
• NT — New Technology, also Windows NT
• 4WA — Four Wire Analog
• BIND — Berkeley Internet Name Domain
• TCPA — Telephone Consumer Protection Act
• LAAS — Local Area Augmentation System
• MSC — Mobile Switching Center
• B8ZS — Binary Eight Zero Substitution
• X — X Window System
• PTT — Push to Talk Taster
• PIM — Protocol Independent Multicast
• RJ-14 — Registered Jack type 14 (2-wire connector)
• FMS — Fraud Management System
• CLEC — Competitive Local Exchange Carrier
• SDNS — Secure Data Network System
• NE — Network Element
• 3G HSPA — Third-Generation High-Speed Packet Access
• VQV — Voice Quality Value
• BP — Block Parity
• ATD — Advanced Technology Demonstration

• LBR — Low Bit Rate
• CDA — Communications Decency Act's
• NW — North West
• ADTM — Asynchronous Data Transfer Mode
• MPU — Main Processor Unit
• VLF — Vertical-Laminar-Flow
• PY — person-year
• B-CPE — Broadband Customer Premises Equipment
• DDM — Data Distribution Manager
• ATU-C — ADSL (Asymmetric Digital Subscriber Line) Transceiver Unit - Central office end
• CERN — Conseil Europeen Pour La Recherche Nucleaire
• ALI — Automatic Location Identifier
• IDCU — Integrated Digital Carrier Unit
• DNA — Do Not Answer
• S/N — Signal-to-Noise ratio
• CT — Cordless Telecommunications
• IV&V — independent verification and validation
• PNP — Positive-Negative-Positive
• CIS — Center for Integrated Systems
• LN — Line
• DPST — Double-Pole Single-Throw
• CBMS — Computer-Based Message System
• BAM — Basic Access Module
• WWAN — wireless wide-area network
• RTC — Right to Carry
• WFG — Wireless Firewall Gateway
• MLA — Modern Language Association
• NSAP — Network Service Access Point
• MAP — Mobile Application Part
• L2F — Layer 2 Forwarding protocol
• RQMTS — Requirements
• CDVT — Cell Delay Variation Tolerance
• TDM — Time Division Multiplexing
• CAM — Computer-Aided Manufacturing
• RRC — Root Raised-Cosine
• CGI — Computer Graphics Interface
• CAMEL — Customized Applications for Mobile-network Enhanced Logic
• MMC — Microsoft Management Console (Microsoft)
• BNCC — Base Network Control Center
• SRA — Seamless Rate Adaptation
• P&A — Privacy and Authentication
• SMS — System Management Server
• DECT — Digital Enhanced Cordless Telecommunication
• APPC — Advanced Program-to Program Communications
• MUSIC — MUltiple SIgnal Classification
• TSDU — Transport Service Data Unit
• GSTN — General Switched Telephone Network
• DOD — Dial on Demand
• TLP — Transmission Level Point
• DMT — Discrete Multi-tone Transmission

• AFPS — Automatic Facility Protection Switching
• ADPCM — Adaptive Differential Pulse Code Modulation
• LSC — Link State Control
• BSID — Base Station Identity
• RADINT — Radar Intelligence
• CSP — Converged Service Platform
• CCA — Carrier-Controlled Approach
• EA — expedited acknowledgement
• DL — Downlink Message
• SCC — Specialized Common Carrier
• NMC — Network Management Center
• SPE — Synchronous Payload Envelope
• TCS — Telephony Control Specification
• ETSI — European Telecommunications Standard Institute
• PSLV — Polar Satellite Launch Vehicle (Indian Space Research Organization; India)
• TDR — Time-Domain Reflectometry
• LXT — Local Exchange Terminal
• LP — Line Pair
• WNAP — Wireless Network Access Point
• LRQ — Location Request
• DDU — Digital Data Unit
• DSCS — Defense Satellite Communication System
• BPSK — Binary Phase-shift Keying
• LSAP — Link Service Access Point
• CEPT — Conférence Européenne des Administrations des Postes et des Télécommunications
• MCR — Minimum Cell Rate (ATM)
• CNID — Calling Number Identification Display
• TELNET — Telecommunications Network Protocol
• NDIS — Network Driver Interface Specification (Microsoft Windows NT)
• REA — Rural Electrification Administration (US)
• SQL — Specified Quality Level
• IVP — Integrated Voice Protocol
• P2P — Person-to-Person
• MTP — Message Transfer Part
• DPNSS — Digital Private Network Signaling System
• AAP — Alternate Access Provider
• SNIX — Single Noise Interference Xterminator
• VISSR — visible and infrared spin scan radiometer (GOES)
• AAV — Alternate Access Vendor
• STU — Secure Telephone Unit
• CCCI — Command, Control, Communications and Intelligence
• FIFO — first-in, first-out
• GLT — Great Lakes Telecom
• PTT — Push to Talk Testing
• CDA — Communications Decency Act of 1996
• DDSN — Digital Derived Services Network
• HDTV — High-Definition Television
• SMSC — Short Message Service Center
• TPS — Telephone Preference Service
• SA — Selective Availability (on GPS transmissions)

• AMOLED — Active Matrix Organic Light-Emitting Diode
• UBR — Unspecified Bit Rate
• ANAC — An Automatic Number Announcement Circuit
• SMMR — Scanning Multichannel Microwave Radiometer
• TRLR — Trailer
• AAL — ATM (Asynchronous Transmission Mode) Adaptive Layer
• AI — Adapter Interface
• DS-3 — Digital Signal, Level 3
• AMTI — Airborne Moving Target Indicator
• CDSL — Consumer Digital Subscriber Line
• AAL2 — ATM (Asynchronous Transmission Mode) Adaptation Layer 2
• HSCSWD — High-Speed Circuit-SWitched Data
• SCE — Service Creation Environment
• STM — Synchronous Transfer Mode
• 100VG — 100 Voice Grade (IEEE 802.12 AnyLAN Standard)
• DCS — Defense Communications System
• LEED — Low-energy Electron Diffraction
• TRIG — Trigger
• SINAD — SIgnal-to-(Noise And Distortion) ratio
• CM — Connection Manager
• BT — Back Trace
• COAM — Customer Owned And Maintained
• DXI — Data Exchange Interface
• LAPB — Link Access Protocol-Balanced
• CLP — Cell Loss Priority (ATM)
• FR — Functional Requirement
• FGDC — Federal Geographic Data Committee's
• MFLOPS — Millions of Floating Point Operations per Second
• VFL — Visual Fault Locator
• CBQ — Class-Based Queuing
• CSR — Customer Service Request
• RPCU — Radio Port Control Unit
• MAG — Mobile Access Gateway
• ARD — Automatic Ring Down
• SFN — Single Frequency Network
• DBRNC — deciBel Relative to Noise in a Circuit
• ACM — Address Complete Message
• CAAS — Communications-as-a-Service
• SR — Scanning Radiometer
• RAD — Recorded Announcement Device
• CSAR — Combat Search and Rescue
• FEM — Finite Element Method
• BT — Bluetooth Tablet
• LCGN — Logical Channel Group Number
• FOC — Fiber-Optic Cable
• UCM — Use Case Map
• VCA — Voice Connecting Arrangement
• TOC — Telecommunication Operations Center
• NLM — NetWare Loadable Module
• OCC — Occupancy

• LORAN — Long Range Aid to Navigation System
• DMT — Discrete Multi-Tone
• BDFB — Battery Distribution Feeder Bay
• COBE — Corporate Owned Business Only
• N-AMPS — Narrowband Advanced Mobile Phone System
• SFX — Special Effects
• DECCO — DISA Defense Commercial Communications Office
• IXC — interexchange carrier
• OSD — Onscreen Display
• WTNM — Working Telephone Number Management
• DS0 — Digital Signal Zero
• NFR — Near-Field Recording
• UNI — User-Network Interface
• CGI — Cell Global Identity
• DEM — Digital Elevation Model
• CDV — Compressed Digital Video
• SAR — Segmentation and Reassembly (ATM)
• DNI — Data Network Interface
• EPP — Enhanced Parallel Port (PC)
• CSCW — Computer-Supported Cooperative Work
• PSQM — Perceptual Speech Quality Measure
• VO — Voice Only
• EV — electronvolt
• IDLC — Integrated Digital Loop Carrier
• OXCO — Oven-Controlled Crystal Oscillator
• ALCAP — Access Link Control Application Protocol
• PSO — Professional Services Organization
• DUN — Dial-Up Networking
• A/D — Analog-to-Digital converter
• NTU — Network Termination Unit
• GMSS — Global Mobile Satellite System
• LMS — Location and Monitoring Service
• VSC — Vertical Service Code
• FEAC — Far End Alarm and Control
• HPN — Home Phone Network
• B-ISDN — Broadband ISDN
• BDSL — Broadband Digital Subscriber Line
• W-CDMA — Wideband Code Division Multiple Access
• DACS — Digital Access and Cross-Connect System
• LR-WPAN — Low-Rate Wireless Personal Area Network
• BPP — Billed Party Preference
• MBE — Molecular Beam Epitaxy
• STM — Scanning Tunneling Microscopy
• PHY — Physical Layer
• QOI — Quality of Information
• WFA — Work Force Administration
• 3GIP — Third Generation Internet Protocol
• BSS — Broadband Switching System
• NTSC — National Television Standards Committee
• * — Star, special function key

• AMTFT — Active Matrix Thin Film Transistor
• CFOT — Certified Fiber-Optic Technician
• XWI — XML (extensible markup language) for Wireless Images
• # — Number sign, octothorp; special function key
• Z — Zulu Time
• UTL — Utility
• LULT — Line Unit/Line Termination
• LSP — Label Switched Path
• NCOS — Network Class Of Service
• MSI — Maritime Safety Information
• PCS — Personal Communications Services
• FTS — Federal Telecommunications System
• COP — Character Oriented Protocol
• M/W — MicroWave
• CPT — Cellular Paging Teleservice
• AECT — Association for Educational Communications and Technology's
• IDCP — Internet Device Control Protocol
• ATCA — Advanced Telecom Computing Architecture
• LVM — Line Verification Module
• FLL — Fixed-Loss Loop
• CAN — Controller Area Network
• DDLD — Direct Dial Long Distance
• WTL — Wireless Transport Layer
• D3 — Digital channel bank, Third generation
• SPT — System Page Table
• PMOS — P-channel Metal Oxide Semiconductor
• MBS — Maximum Burst Size (ATM)
• MEH — Mobile-Executed Handoff
• AB — Answer Back
• ATRAC — Adaptive Transform Acoustic Coding
• EIR — Excess Information Rate
• NEMP — Nuclear Electromagnetic Pulse
• TP — Transaction Processor
• FAW — Frame Alignment Word
• GRX — GPRS Roaming Exchange
• SIGTRAN — Signaling Transport
• MDN — Mobile Directory Number
• BHCA — Busy Hour Call Attempts
• PM — Processable Mode
• RADARSAT — Radar Satellite
• FFH — Fast Frequency Hopping
• SPI — Security Parameters Index
• TMSI — Temporary Mobile Subscriber Identity
• MB — Measured Business
• VOFR — Voice Over Frame Relay
• ATB — Above-Ground Telecommunications Backbone
• EST — Electroshock Therapy
• ADIF — Accounting Data Interchange Format
• ESA — Enhanced Subscriber Authentication
• SIO — Service Information Octet

• OLS — Optical Line System
• QPM — QoS (Quality of Service) Policy Manager
• AEA — American Electronics Association's
• DNC — Do Not Call
• ARPT — Autorité de Régulation des Postes et Télécommunications
• DUV — Deep Ultraviolet
• TRX — Tandem Repeater eXchange
• BAOC — Barring of All Outgoing Calls supplementary service
• USRT — Universal Synchronous Receiver/Transmitter
• CMT — Commercial Metering Transponder
• TED — Triteal Enterprise Desktop
• RLS — Recursive Least Squares
• GFC — Generic Flow Control (ATM)
• DAF — Directory Access Function
• GTB — Global Telecom Brokers
• DLU — Digital Line Unit
• BCIX — Berlin Commercial Internet Exchange
• SR — Slow Release
• ROW — Rest Of World
• DFE — Design For Environment
• CCSA — Common Control Switching Arrangement
• DCEF — Distributed Cisco Express Forwarding
• ILETS — International Law Enforcement Telecommunications Seminar
• GOMP — Get Off My Phone
• BIC — Bus Interface Controller
• DMT — Digital-Discrete Multi-Tone
• AIS-V — Alarm Indication Signal - Virtual
• TSR — Terabit Switch/Router
• AAS — Automatic Announcement Subsystem
• SVI — Service Interception
• VCR — Videocassette Recorder
• AGCH — Access Grant Channel
• OCI — object code insertion
• RCT — remote Control Terminal
• BTP — Business Telecom Products, Inc.
• PMT — Photo Multiplier Tube
• ISC — International Switching Center
• IPXCP — Internetwork Packet Exchange Control Protocol
• RBS — Robbed Bit Signaling
• BHCC — Busy Hour Call Completions
• ODS — Operational Data Store (knowledge management)
• BSRF — Basic System Reference Frequency
• SEM — Scanning Electron Microscopes
• OOK — On/Off Keying
• E2E — End-to-End
• BABT — British Approvals Board for Telecommunications
• CDDI — Copper Distributed Data Interface
• CASE — Computer-Aided Software Engineering
• TSGR — Transport System Generic Requirements
• NAP — Network Access Point

• NMS — NetWare Management System
• ATSC — Advanced Television Systems Committee
• EVC — Electronic Voucher Charging
• AIS-L — Alarm Indication Signal - Line
• FPLMTS — Future Public Land Mobile Telecommunications System
• SCORM — Shareable Content Object Reference Model
• AMP — amplifier / amplification
• DLT — Delete
• JISC — Japanese Industrial Standards Committee
• LIU — Line Interface Unit
• CEE — Communaut? Economique Europ?enne
• BC — Basic Call
• MAU — Multistation Access Unit
• WAW — Wide Area Wireless
• SS7 — Signaling System 7
• ANT — ADSL Network Terminator
• SDHLR — Super-Distributed Home Location Register
• PSK — Phase Shift Key
• CCITT — Comite Consultatif International Telegraphique et Telephonique (now ITU-T)
• IOC — Interoffice Channel
• DPT — Dial Pulse Terminate
• ECTF — Enterprise Computer Telephony Forum
• CACM — Communications of the ACM
• MEID — Mobile Equipment Identifier
• ULP — Upper Layer Protocol
• RNR — Receive Not Ready
• ECC — Emergency Communications Center
• UMTS — Universal Mobile Telecommunication System
• DLE — Digital Local Exchange
• DUV — Data-Under-Voice
• LMDS — Local Multipoint Distribution Service
• NRZ — Nonreturn To Zero
• VGF — Voice Grade Facility
• VLR — Visitor Location Register
• DNU — Do Not Use
• CSDU — Core Service Data Unit
• RM-ODP — Reference Model for Open Distributed Processing
• MAC — Message Authenticity Check
• CCLC — Carrier Common Line Charge
• BSC — Base Station Controller
• LAT — Local Area Transport (network)
• TSI — time-slot interchange
• DLT — Digital Line Termination
• CCSS6 — Common Channel Signaling System # 6
• VADB — Virtual Auto Dial Backup
• PSN — Public Switched Network
• ZD — Zero Defects
• TC — Technical Committee (HL7)
• NSE — Network Software Environment
• MILNET — Military Network

• PLCP — Physical Layer Convergence Protocol (ATM)
• DCC — Digital Control Channel
• STA — Science and Technology Agency (Japan)
• SAPI — Service Access Point Identifier
• MTS — Message Transmission Subsystem
• BAN — Billing Account Number
• BB — Blackberry
• SMU — Service Management Unit
• E — Exchange
• WBMP — Wireless Bitmap
• CVT — Circuit Validation Test
• ISD — International Subscriber Dialling
• ACEK — Authentication Encryption Key
• BSVCI — Broadcast Signaling Virtual Channel Identifier
• MEECN — Minimum Essential Emergency Communication Network
• EC — Entropy Coding
• PMMA — Polymethyl Methacrylate
• ATU-R — ADSL (Asymmetric Digital Subscriber Line) Transceiver Unit - Remote terminal end
• OIM — Operations Interface Module
• MCPC — Multiple Channels Per Carrier
• CLASS — Cell Level ATM (Asynchronous Transfer Mode) Services Simulator
• DCO — Dial Central Office
• SRS — Supported Residential Services
• ACU — Automatic Calling Unit
• CS — Connection Segment
• ALT — Automatic Link Transfer
• TARP — Target Identifier Address Resolution Protocol
• NICT — National Institute of Information and Communications Technology
• BRAN — Broadband Radio Access Network
• AEIMP — Apple Event Interprocess Messaging Protocol
• WSP — Wireless Service Provider
• 3GSM — Third-generation Global System for Mobile (communications)
• IBS — In-Building Solutions
• AFRINIC — African Network Information Centre
• UDT — Unreliable Data Transfer
• FRF-LMI — Frame Relay Forum - Local Management Interface
• FD — Full Duplex
• CCR — Current Cell Rate (ATMF)
• CU — Cooling Unit
• RDSS — Radio Determination Satellite Service
• JDC — Japan Digital Cellular
• ANSI — Advanced Network Signaling Input
• LSMS — Local Service Management System
• AA — Auto-Answer
• ECDIS — Electronic Chart Display Information System
• GOSIP — Government Open Systems Interconnection Profile
• V — Vector
• SDN — Software Defined Network
• BORSCHT — Battery feed, Overvoltage protection, Ringing, Signaling, Coding, Hybrid, and Testing
• AFI — Authority and Format Identifier

• LOP-P — Loss Of Pointer - Path
• DSU — Digital Service Unit
• BTS — Base Transceiver Station (cellular)
• BHP — Burst Header Packet
• WAR — Wireless Access Revolution
• LSF — Line Spread Function
• RS-422 — Recommended Standard 422 (ANSI/EIA standard for transmitting serial data)
• MOS — Metal Oxide Semiconductor (FET Devices)
• AIU — Analog Interface Unit
• SLIC — Subscriber Loop Interface Circuit
• KTS — Key Telephone System
• ISSI — Inter-Switching System Interface
• ZBTSI — Zero Byte Time Slot Interchange
• UMTS — Universal Mobile Telecommunications Standard
• WFT — Wireline Formation Test
• CPN — Customer Premise Network
• WPKI — Wireless Public Key Infrastructure
• EC — Echo Cancelling
• PCIA — Personal Communications Industry Association
• RDI-L — Remote Defect Indicator - Loop
• DF — Direction Finding or Finder
• USF — Universal Server Farm
• CALS — Computer Aided Acquisition and Logistic Support
• UIH — Unnumbered Information with Header check
• HUMAN — High-speed Unlicensed Metropolitan Area Network
• DACS — Digital Access Carrier System
• NESC — National Electrical Safety Code
• CD — Committee Draft
• LSI — Large-Scale Integration
• NARC — Non-Automatic Relay Center
• FEBE — Far End Block Error (SONET)
• CCC — CDMA Cluster Controller
• BUS — Broadcast and Unknown Server
• ISP — International Signaling Point
• ATIS — Automatic Transmitter Identification System
• HDB3 — High-Density Bipolar Three-bit substitution
• KEK — Key Encrypting Key
• SNI — Service Node Interface
• KSPS — KiloSymbols Per Second
• TTC — Telemetry Telecommand and Control
• ITA — Illinois Telecommunications Association
• DTR — Down-Time Ratio
• SAM — Service Access Multiplexer
• LRF — Laser Range Finder
• CAS — Column Address Strobe
• CQ — Communications Quality
• SMT — station management (protocol)
• CSP — Continuous Speech Processing
• WPBX — Wireless Private Branch Exchange
• VPC — Virtual Path Connection (ATM)

• LQC — Line Quality Control
• TSD — Type Specific Driver
• SES — Scientific and Engineering Software
• PT — Payload Type (ATM)
• C² — Command and Control
• ADM 3X — DS3 Add-Drop Multiplex
• SR — Service Request
• VAD — Voice Activity Detection
• ASAS — All-Source Analysis System
• LUNT — Line Unit Network Termination
• RADSL — Rate Adaptive Digital Subscriber Line
• INAP — Intelligent Network Application Part
• BCSM — Basic Call State Model
• BHA — Busy Hour Attempts
• WCMP — Wireless Control Message Protocol
• LEC — Liquid Encapsulated Czochralski
• TWX — Teletypewriter Exchange (Telex)
• PTO — U.S. Patent And Trademark Office
• LRB — Loop Reverse Battery
• DMI — Desktop Management Interface (computing)
• ATTRA — Appropriate Technology Transfer for Rural Areas
• USPI — Universal Serial Phone Interface
• ETOC — Electronic Table of Contents
• DOITT — Department of Information Technology and Telecommunications
• QOD — Quality of Data
• ADTS — Ameritech Digital Transport Service
• AIS-P — Alarm Indication Signal - Path
• MMS — Multimedia Message Service
• JSC — Joint Scientific Committee (ICSU, WCRP, and WMO)
• GOSIP — Government Open System Interconnection Profile
• VCC — Voice Call Continuity
• RLC — Radio Link Control
• DORA — EV-DO (EVolution-Data Optimized) standard Revision A
• CLF — Carrier Line Failure
• CEPT — Conference of European Posts and Telecommunications
• FECC-F — Forward Error Correction Count - Fast data
• LMT — Lightwave Microcell Transceiver
• JMA — Japanese Meteorological Agency
• PFE — Power Feed Equipment
• QEDI — Quod Erat Demonstrandum
• OC-1 — Optical Carrier Signal, Level 1
• MDCP — Media Device Control Protocol
• CALA — Customer Address Location Area
• APS — Advanced Power System
• DTU — Date/Time Update
• ATMS — automatic transmission measuring system
• EC — Equipment Controller
• WDSL — Wireless Digital Subscriber Line
• RCF — Remote Call Forwarding
• UTP — unshielded twisted pair

• SSTC — Subsystem Status Test Control
• TSC — Technical Standards Committee
• NAM — Number Assignment Module
• F/W — Firmware
• BFS — Broadcast File System
• APR — Alarm Processing Remote
• IR — Information Request
• LDI — Long Distance Interconnect
• LMS — Local Measured Service
• IMTS — Improved Mobile Telephone Service
• OID — Object Interaction Diagram
• CCH — Common Channel Handler
• CLI — Calling Line Identification
• CYTA — Cyprus Telecommunications Authority
• DSP — Data Service Provider
• AVT — Audio Visual Telecommunications
• LFTYR — Ley Federal de Telecomunicaciones y Radiodifusión
• WUP — Wired Up Privacy
• MERIS — medium-resolution imaging spectrometer
• AH — Authentication Header
• DLC — Digital Leased Circuit
• DOV — Data-Over-Voice
• CSI — Clearing Subnetwork Identification
• FEBE-F — Far End Block Error count - Fast data
• CTTC — Centre Tecnològic de Telecomunicacions de Catalunya
• DCSS — Digital Cross-connect Systems
• MRVT — MTP Routing Verification Test
• FUD — Fair Use Doctrine
• ACNA — Access Customer Name Abbreviation
• DAS — Distributed Antenna System
• DCA — Distributed Communications Architecture
• TACS — Total Access Cellular System
• RAI — remote alarm indication
• ETSI — European Telecommunications Standards Institute
• TPF — Transmission Priority Field
• SMG — Super Master Group
• NSEP — National Security Emergency Preparedness
• HU — Hook Up
• PNE — Path Number Efficiency
• GSM — Global System for Mobile telecommunications
• SDCCH — Standalone Dedicated Control Channel
• WAWS — Washington Area Wideband System
• IMPI — IP (Internet Protocol) Multimedia Private Identity
• RSN — Regional Service Network
• ADTS — Automated Digital Terminal System
• JWG — Joint Working Groupof
• SDSL — Symmetrical Digital Subscriber Line
• RCMAC — Recent Change Memory Administration Center
• SASL — Simple Authentication and Security Layer
• TOMS — Telecom Operations Management System

• TCL — Transverse Conversion Loss
• MP — Master Processor
• FOTS — Fiber Optical Transmission System
• APS — American Protective Services
• MQFP — Metric Quad Flat Pack
• MVDS — Microwave Video Distribution System
• GOS — Gerry Otis Simpson
• TP-PMD — Twisted Pair Physical Medium Dependent
• ACMA — Atlantic Cable Maintenance Agreement
• IOS — Internet Over Satellite
• ACA — Automatic Circuit Assurance
• DCB — Digital Channel Bank (Sprint)
• AL — Alignment
• ML-PPP — Multilink Point-to-Point Protocol
• GTXC — Global Telephone Exchange Carrier
• WAPI — Wireless LAN Authentication and Privacy Infrastructure
• MBMS — Multimedia Broadcast/Multicast Service
• ESP — Essential Service Protection
• WGX — Wireless Gateway Switch
• STD — Secondary Telecom District
• SMDR — station message detail recording
• UPS — Un-interruptable Power Supply
• BCS — British Computer Society
• AEE — Agent Execution Environment
• DDS — Dataphone Digital Service (AT&T)
• BONDING — Bandwidth On Demand Interoperability Group
• MO — Magneto-optic
• DS-1 — Digital Signal, Level 1
• EADAS — Engineering and Administrative Data Acquisition System
• SCO — Synchronous Connection Oriented
• FWS — Fixed Wireless Services
• MED — Manipulative Electronic Deception
• NMC — Network Model Coverage
• IPOATM — Internet Protocol over ATM
• DECT — Digital Enhance Cordless Telecommunications
• ASP — Active Signaling Protocol
• DRTT — Dial Repeating Tie Trunk
• NMC — Nortel Matra Cellular
• PTM — Point-To-Multipoint
• CONS — Connection-oriented Network Services
• CMOS — Cellular Management Operation System
• LCU — Lightweight Computer Unit
• CLOS — Clear Line Of Sight
• HTO — Hellenic Telecommunications Organisation
• TAE — Terminal Adapter Equipment
• AS — Active Service
• FRAD — Frame Relay Assembler/Disassembler
• PTT — Post Telegraph and Telecommunications
• WIS — WAN (Wide Area Network) Interface Sublayer
• FOE — Fiber Optic Equipment

• MEAS — Measure
• WDF — Wireless Data Forum
• NSN — National Significant Number
• MAPDU — Management Application Protocol Data Unit
• AQP — Association for Quality and Participation
• DTW — Dynamic Time Warping
• CSTA — Computer Supported Telecommunications Applications
• NICAD — Nickel Cadmium
• ARCNET — Attached Resource Computer Network
• VGC — Voice Grade Channel
• PRM — Performance Report Message
• EDGE — Enhanced Data for GSM (Global System for Mobile communication) Evolution
• CT — Control terminal
• CSAA — Central Service Area Authority
• STN — Station Casinos, Inc.
• MOC — Maintenance and Operations Console
• ATR — Advanced Telecommunications Research Institute
• COI — Community of Interest
• MIN — Mobile Identification Number
• SGSN — Serving GPRS (General Packet Radio Service) Support Node
• WDMW — Web Directory for Mobile and Wireless
• WTP — Wireless Transaction Protocol
• CMAS — Cellular Management System
• ICLD — Inter-Channel Level Difference
• IPC — Initial Paging Channel
• CTIT — College of Telecommunications and Information Technology
• UVG — Universal Voice Grade
• LOB — Line Of Bearing/Balance
• NSDI — National Spatial Data Infrastructure
• SGS — Software Generation System
• INWATS — INward Wide Area Telecommunications Service
• DACS — Digital Access Cross-Connect Switch
• BSSMAP — Base Station System Management Application Part
• PSC — Picture Start Code
• EMV — EuroPay, MasterCard, Visa
• AUSPI — Association of Unified Telecom Service Providers of India
• RSL — Request and Status Links
• E-TDMA — Expanded Time Division Multiple Access
• UTP — Universal Transmission Protocol
• CAIRO — Communications Audio Interface for Remote Operations
• DCS — Digital Cross-connect Switch
• LQR — Line Quality Report
• ICTA — Idaho Cable Telecommunications Association
• CAE — Common Application Environment
• IRAC — Interdepartment Radio Advisory Committee
• HQGSM — High-Quality Global System for Mobile communications
• CFR-47 — Code of Federal Regulations Title 47 (FCC)
• NAU — Network Addressable Unit
• RBT — Ring Back Tone
• SS6 — Signalling System 6

• DMNG — Digital Mobile News Gathering
• ZCZ — Zero Correlation Zone
• CF — Coin First Payphone
• TD-CDMA — Time Division - Code Division Multiple Access
• WLNP — Wireless Local Number Portability
• SM OFC — Single-Mode Optical Fiber Cable
• DORK — Disciples Of The Righteous King
• CPS — Customer Premises System (Bellcore)
• ADM — Administration, Office of
• IPCU — iPhone Configuration Utility
• SLC — Service Level Contract
• LTU — Line Termination Unit
• EKTS — Electronic Key Telephone Set
• CDR — Common Data Rate
• DEO — Digital End Office
• STD — Standard Deviation
• SACS — Security Access Control System
• CL — cell loss
• RCR — Research and Development Center for Radio Systems
• BANC — Broadband Access Network Coordination
• MSG — Management Steering Group
• IPTD — Internet Protocol Telephony Design
• MNOS — Metal-nitride-oxide Semiconductor
• CFNA — Call Forwarding No Answer
• BIOS — Basic Input-Output System
• NAM — Numeric Assignment Module
• DPDCH — Dedicated Physical Data Channel
• BTO — Betts Telecom Oklahoma
• CW — Call Waiting Supplementary Service
• ICI — Interexchange Carrier Interface
• VC — Virtual Circuit (ATM)
• WDRM — Wireless Design Reference Manual
• EC-N — Electrical Carrier (n=a number, e.g., EC-4)
• 4G — Fourth Generation
• SLIP — Serial Line Internet Protocol
• ESG — Enhanced Service Gateway
• PAGCH — Paging and Access Grant Channel
• OST — Office of Science and Technology
• LCU — Line Control Unit
• CNE — Certified Novell Engineer
• OODBMS — Object-Oriented Database Management Systems
• BPOP — Building Point of Presence
• PTM — Packet Transport Mode
• SSCP — System Services Control Point
• TPC — The Phone Company
• TBRL — Terminal Balance Return Loss
• RZ — Return to Zero
• CIPOA — Classical Internet Protocol over ATM (Asynchronous Transfer Mode)
• DCMES — Dublin Core Metadata Element Set
• CAL — Customer Access Line

• IRLAP — InfraRed Link Access Protocol
• CVSD — Continuous Variable Slope Detection
• D4 — Digital channel bank, Fourth generation
• CD-ROM — Compact Disk-Read-Only Memory
• FEBE-I — Far End Block Error count - Interleaved data
• MRT — Medical Response Team
• M2M — Multipoint-to-Multipoint
• MRCA — Most Recent Common Ancestor
• WVPN — Wireless Virtual Private Network
• FESS — Flywheel Energy Storage System
• DTU — Data Terminal Unit
• ADC — Advanced Data Control
• MOD — Modulo
• MFJ — Modified Final Judgement
• SAMA — Spread Aloha Multiple Access
• DFRI — Datacom Reference Frame Input
• WPOP — Wireless Point-of-Presence
• TEM — Transmission Electron Microscope
• RSI — Record Status Indicator
• EF&I — Engineering, Furnishing and Installation
• LRF — Location Registration Function
• CUG — Closed Users Group
• GEO — Geostationary Earth Orbit
• DF — Distributing Frame
• NTE — Network Terminating Equipment
• DBN — Dial-Back Number
• TR — Temporal Reference
• VCT — Variable Cam Timing
• FELB — Far-End Loop Back
• NIMH — Nickel-Metal Hydride
• RU — Release Unit
• SINS — Ship’s Inertial Navigation System
• DISA — Direct Inward Switch Access
• DDSD — Delay Dial Start Dial
• CM — Common Mode
• CLIP — Caller Line Identification Presentation
• EDT — European Deaf Telephone
• UDC — Universal Digital Channel
• TON — IEEE/ACM Transactions On Networking
• SGCP — Simple Gateway Control Protocol
• DTS — Digital Terminal Systems
• DMI — Digital Multiplex Interface
• RYP — Russian Yellow Pages
• ARAI — Adjunct Route Application Interface
• MMC — Minimum Monthly Charge
• IPR — Intellectual Property Right
• DBF — Digital Beam-Forming
• DRTL — Dial Repeating Tie Line
• VHM — Voice Health Monitor
• AFIPS — American Federation of Information Processing Societies

• VGCP — Voice Grade Channel Processor
• WNAS — Wireless Network Access Services
• FEFA — Far End Failure
• SMAS — Service Management System
• WEDE — Wireless Enterprise Delivery Environment
• ASC — Available Spare Capacity
• DE — Discard Eligible
• TACSIM — Tactical Simulation (Simulator)
• NPSI — Network Packet Switching Interface
• SHR — Self-Healing Ring
• AGPS — Assisted Global Positioning System
• NSM — Network Status Monitor
• XRF — X-Ray Fluorescence
• EFRC — Enhanced Full Rate Codec
• MM — Multimode (fiber optic cable)
• RDI-P — Remote Defect Indicator - Path
• RFI — Remote File Inquiry
• WIG — Wireless Internet Gateway
• SCC — Signal Conversion Circuit
• PMD — Physical Media-Dependent
• NARSAP — National Advanced Remote Sensing Application Program
• QPA — Quality Performance Analysis
• TFL — Telecom Fiji Limited
• ROSE — Remote Operations Service Element
• UBT — Universal Backend Tester
• ETOM — Enhanced Telecom Operations Map
• DLCS — Digital Loop Carrier System
• WAGN — West Antarctic GPS (Global Positioning System) Network
• STDM — Statistical Time Division Multiplexing
• VRT — Voltage Reduction Technology
• NECA — National Exchange Carrier Association
• 4WE&M — Four-Wire Ear and Mouth
• LBX — Low Bandwidth X
• TRAC — Totally Reconfigurable Analog Circuit
• ALC — Automatic Line Controller
• CSL — component sublayer
• HEC — Header Error Control
• ATL — Advanced Technology Laboratory
• VDSL — VHBR (Very High Bit Rate) Digital Subscriber Line
• TANE — Telephone Association of New England
• ISM — Interstellar Medium
• ENUM — tElephone NUmber Mapping
• CITR — Canadian Institute for Telecommunications Research
• FHSS — Frequency Hopping Spread Spectrum
• SYNC — Synchronization
• CD ROM — Compact Disc Read-Only Memory
• FCFS — First-Come, First-Served
• SC — Switching Center
• LADS — Local Area Data Service
• VTIR — visible and thermal infrared radiometer

• VAN — Value-Added Network
• WCRL — Wireless Communications Research Laboratory
• GPBX — Global Private Branch eXchange
• EC — Enhanced Cellular
• DUNCE — Dial-Up Networking Connection Enhancement
• DTV — Digital Television
• JWP — Joint Working Party
• CATI — Computer-Assisted Telephone Interviewing
• STE — Syrian Telecommunications Establishment
• EGPRS — Enhanced General Packet Radio Service
• BS — Busy Season
• UPC — Usage Parameter Control
• RLC — Reverse Link Channel
• D/I — Drop and Insert
• AT — Access Terminal