What does O4 stand for?
O4 stands for "Officer grade: Captain or Colonel"
How to abbreviate "Officer grade: Captain or Colonel"?
"Officer grade: Captain or Colonel" can be abbreviated as O4
What is the meaning of O4 abbreviation?
The meaning of O4 abbreviation is "Officer grade: Captain or Colonel"
What does O4 mean?
O4 as abbreviation means "Officer grade: Captain or Colonel"
