What does OP stand for?
OP stands for "Olber's Paradox"
How to abbreviate "Olber's Paradox"?
"Olber's Paradox" can be abbreviated as OP
What is the meaning of OP abbreviation?
The meaning of OP abbreviation is "Olber's Paradox"
What does OP mean?
OP as abbreviation means "Olber's Paradox"
