What does O.P stand for?

What does O.P mean?

OP	OPeration Medical » Physiology
OP	OPeration Governmental » NASA
OP	Operations Governmental » Military
OP	Out Of Print Community » Media
OP	Office Products Business » Products
OP	Obras Publicas International » Guatemalan
OP	Other Peoples Medical » Laboratory
OP	On Program Medical » Hospitals
OP	Out Patient Medical » Physiology
OP	On Plan Business » General
OP	One Piece Miscellaneous » Unclassified
OP	Official Publication Governmental » US Government
OP	Open Position Community » Sports
OP	Ocean Pacific Miscellaneous » Clothes
OP	Open Platform Computing » Hardware
OP	Operating Plan Governmental » Military
OP	Observation Post Governmental » Military
OP	Overall Position Governmental » Military
OP	Open Pollinated Academic & Science » Botany
OP	Orange Pekoe Miscellaneous » Food
OP	Operator Panel Computing » General
OP	Original Post Miscellaneous » Unclassified
OP	Oral Presentation Miscellaneous » Unclassified
OP	Overland Park, Kansas Regional » States
OP	Orthographic Projection Community » Media