What does OPO stand for?
OPO stands for "Office of the Permanent Observer"
How to abbreviate "Office of the Permanent Observer"?
"Office of the Permanent Observer" can be abbreviated as OPO
What is the meaning of OPO abbreviation?
The meaning of OPO abbreviation is "Office of the Permanent Observer"
What does OPO mean?
OPO as abbreviation means "Office of the Permanent Observer"
