-
Performance Reward Options
business | occupation & positions
-
Public Relations Officers
business | occupation & positions
-
miscellaneous | manufacturing
-
miscellaneous | hobbies
-
Philippine Ragnarok Online
internet
-
Performance Rights Organization
community | performing arts
-
governmental | us government
-
miscellaneous | unclassified
-
Privilege, Responsibility, And Opportunity
business | occupation & positions
-
internet | chat
-
Personnel Recovery Officer
governmental | military
-
community
-
medical | physiology
-
governmental | military
-
Pittsburgh Roleplaying Organization
community | sports
-
Prolog Language Source Code File
computing | file extensions
-
computing | general
-
governmental | nasa
-
Profile Configuration Data
computing | file extensions
-
community | media
-
Predictable Research Online
internet
-
Positive Recreation Opportunities
community
-
Graphics Profile File (dos)
computing | file extensions
-
Pride, Respect, And Opportunity
community | law & legal
-
Perfectly Respectful Obedience
governmental | military
-
community | religion
-
business | general
-
governmental | nasa
-
medical | british medicine
-
community | law & legal
-
Prophecy International Holdings Ltd
business | asx symbols
-
academic & science | physics
-
governmental | state & local
-
Professional (for Licensed Professionals Only)
internet | domain names
-
Professional Rental Owner
business | occupation & positions
-
People, Resources, And Organizations
business | general
-
medical | british medicine
-
community | sports
-
governmental | military
-
medical | british medicine
-
medical | british medicine
-
governmental
-
Practical Regional Opportunities
business | international business
-
medical | hospitals
-
Phillipines Ragnarok Online
internet
-
medical | british medicine
-
business | general
-
miscellaneous
-
governmental | state & local
-
medical | british medicine
-
medical | british medicine
-
Proper Ram-air Orientation
governmental | military
-
regional | language codes (3 letters)
-
Public Record Office (uk Government)
governmental
-
miscellaneous | funnies
-
business | general
-
medical | british medicine
-
Peer Review Organizations
miscellaneous | unclassified
-
governmental | united nations
-
medical | british medicine
-
medical | british medicine
-
business | occupation & positions
-
miscellaneous | aircraft & aviation
-
People Relating To Others
community | educational
-
business | london stock exchange
-
miscellaneous | toastmasters
-
governmental | us government
-
business | occupation & positions
-
Patients’ Rights Organisation
medical | british medicine
-
business | general
-
business | international business
-
Physician Review Organisation
medical | british medicine
-
miscellaneous | unclassified
-
Professional Review Organisation
medical | british medicine
-
Public Research Organization
community | non-profit organizations
-
Photographic Research Organization
business | companies & firms
-
Progressive Re-integration Opportunity
community | law & legal
-
Predicament, Response, And Outcome
community | law & legal
-
Player Referee Organization
community | sports
