What does OSO stand for?
OSO stands for "Originating Signaling Office"
How to abbreviate "Originating Signaling Office"?
"Originating Signaling Office" can be abbreviated as OSO
What is the meaning of OSO abbreviation?
The meaning of OSO abbreviation is "Originating Signaling Office"
What does OSO mean?
OSO as abbreviation means "Originating Signaling Office"
