What does P.R. stand for?

What does P.R. mean?

PR	Personal Records Academic & Science » Universities
PR	Prerequisite Required Academic & Science » Universities
pr	PRepare for printing Computing » Unix Commands
PR	Progress Report Governmental » US Government
PR	Proportional Representation Governmental » US Government
PR	Permanent Resident Governmental » US Government
PR	Permanent Residency Governmental » US Government
PR	Puerto Rican Governmental » US Government
PR	Person Responsible Governmental » US Government
PR	Pushing Revenue Governmental » US Government
PR	Public Relations Governmental » US Government
PR	Poste Restante Miscellaneous » USPS
PR	Pier Miscellaneous » USPS
PR	Puerto Rico Regional » States
PR	Praise and Release Medical » Veterinary