| Purdue Alumni Association | Academic & Science |
| Physics Astronomy Auditorium | Academic & Science |
| Performing Arts Academy | Academic & Science |
| Portland Adventist Academy | Academic & Science |
| Peer Academic Advisor | Academic & Science |
| Polyacrylic Acid And | Academic & Science |
| Pa-an | Airport Code |
| Pakistan Advertising Association | Business |
| Peninsula Agency on Aging | Business |
| Positive Actions Always | Business |
| Plains All-American Pipeline | Business |
| Population Association Of America | Business |
| The Proffessional Anglers Association | Business |
| Product Advertizing Administrator | Business |
| Pan American Silver Corporation | Business |
| PharmAust Ltd | Business |
| Parallel Media | Business |
| Polyacrylic Acid | Chemistry |
| Phosphoric Acid Anodized | Chemistry |
| Practical And Applied Arts | Community |
| Pacific Arts | Community |
| Piedmont Arts Association | Community |
| Pennsylvania Apartment Association | Community |
| Psoriatic Arthropathy Alliance | Community |
| Pennsylvania Auctioneers Association | Community |
| Polish American Association | Community |
| Potato Association of America | Community |
| Parish Athletic Association | Community |
| Play Area Association | Community |
| Pennsylvania Auto Association | Community |
| Prominent African Americans | Community |
| Paper Aeronautics Association | Community |
| Personal Audio Amplifier | Computer Hardware |
| Peer Access Approval | Computing |
| Port Analyzer Adapter | Computing |
| Performance Assurance Agent | Computing |
| place an ad | General |
| Plan Administration Account | General |
| Post Approval Activities | General |
| Pair Availability Analysis | General |
| PACER Administrative Account | General |
| Pre Assessment Activity | General |
| Premium Allocation Approach | General |
| Protein Array Analyzer | General |
| Post Approval Amendment | General |
| Position Area for Artillery | General |
| Pokemon Art and Animation | General |
| Pi Alpha Alpha | General |
| Protective Asset Allocation | General |
| Providence Anesthesiology Associates | General |
| Program Admissions Assessment | General |
| Peak Analysis and Automation | General |
| Piecewise Aggregate Approximation | General |
| Polished Anodized Aluminium | General |
| Pan American Airways | General |
| Personal Analog Agent | General |
| Plains All American | General |
| Porsche Active Aerodynamics | General |
| Pennsylvania Automotive Association | General |
| Premium Automotive Alliance | General |
| Punx Are Alive | General |
| Potential Annexation Area | Governmental |
| Penny Arcade Alliance | Governmental |
| Police Athletic Association | Governmental |
| Participating Affiliate Agreement | Governmental |
| PATAS | Indian Railway Station |
| People Also Ask | Internet |
| Pet Allergy Association | Medical |
| Peri Anesthesia Anaphylaxis | Medical |
| Pediatric and Adolescent Associates | Medical |
| Parti Affectae Applicandus | Medical |
| Pintle Adapter Assembly | Military and Defence |
| Position Area of Artillery | Military and Defence |
| Primary Aircraft Authorization | Military and Defence |
| Papuan- Australian (Other) | Regional |
| Professional Anglers Association | Sports |
| Pasadena Athletic Association | Sports |
| Pittsburgh Athletic Association | Sports |
| Peninsula Athletic Association | Sports |
