What does OP stand for?
OP stands for "Optional Procedure Mailing System"
How to abbreviate "Optional Procedure Mailing System"?
"Optional Procedure Mailing System" can be abbreviated as OP
What is the meaning of OP abbreviation?
The meaning of OP abbreviation is "Optional Procedure Mailing System"
What does OP mean?
OP as abbreviation means "Optional Procedure Mailing System"