What does MSSU stand for?
MSSU stands for "Message Switching System Upgrade"
How to abbreviate "Message Switching System Upgrade"?
"Message Switching System Upgrade" can be abbreviated as MSSU
What is the meaning of MSSU abbreviation?
The meaning of MSSU abbreviation is "Message Switching System Upgrade"
What does MSSU mean?
MSSU as abbreviation means "Message Switching System Upgrade"
