What does OIS stand for?
OIS stands for "Operational Intercom System"
How to abbreviate "Operational Intercom System"?
"Operational Intercom System" can be abbreviated as OIS
What is the meaning of OIS abbreviation?
The meaning of OIS abbreviation is "Operational Intercom System"
What does OIS mean?
OIS as abbreviation means "Operational Intercom System"
