What does P.O stand for?

What does P.O mean?

PO	Post Office Governmental » US Government
PO	Post Office Community » Media
PO	Post Office Miscellaneous » USPS
PO	Purchase Order Business » Accounting
PO	Purchase Order Governmental » Military
PO	Purchase Order Community » Educational
PO	Portland, Oregon Regional » States
PO	Parents Of Community » Law
PO	Police Officer Community » Law
PO	Police Officer Governmental » Police
PO	Purchase Order Governmental » NASA
PO	Pull Out Governmental » Military
PO	Plus One Computing » Assembly
Po	Polonium Academic & Science » Chemistry
PO	Purchase Orders Miscellaneous » Unclassified
PO	Pull Off Community » Sports
PO	Post Operative Medical » Physiology
PO	PrintOut Computing » General
PO	Pacific Ocean Academic & Science » Ocean Science
PO	Pay Off Community » Sports
PO	Previous Owner Business » General
PO	Power Outage Academic & Science » Electronics
PO	Polyolefin Miscellaneous » Plastics
PO	Per Os (by mouth) Medical » Veterinary
PO	Petites Ondes International » French