What does O/A mean in Governmental & Military

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All O/A meanings

What does O/A stand for?

O/A stands for "On Or About"

How to abbreviate "On Or About"?

"On Or About" can be abbreviated as O/A

What is the meaning of O/A abbreviation?

The meaning of O/A abbreviation is "On Or About"

What does O/A mean?

O/A as abbreviation means "On Or About"