What does OUO stand for?
OUO stands for "Openings to Underground Operations"
How to abbreviate "Openings to Underground Operations"?
"Openings to Underground Operations" can be abbreviated as OUO
What is the meaning of OUO abbreviation?
The meaning of OUO abbreviation is "Openings to Underground Operations"
What does OUO mean?
OUO as abbreviation means "Openings to Underground Operations"
