What does OPP stand for?
OPP stands for "Outer Planets Program"
How to abbreviate "Outer Planets Program"?
"Outer Planets Program" can be abbreviated as OPP
What is the meaning of OPP abbreviation?
The meaning of OPP abbreviation is "Outer Planets Program"
What does OPP mean?
OPP as abbreviation means "Outer Planets Program"
