| Peninsula Internet Academy | Academic & Science |
| Programme of Integrative Assignments | Academic & Science |
| Personal Investment Authority | Accounts and Finance |
| Peoria (il) | Airport Code |
| Primary Insurance Amount | Business |
| Printing Industries of America | Business |
| Printing Industries Association | Business |
| Philippine Information Agency | Business |
| Post Investment Analysis | Business |
| Morgan Stanley Dean Witter | Business |
| People In Action | Community |
| Please Inform Allah | Community |
| Parachuting Industry Association | Community |
| Printing and Imaging Association | Community |
| Paint, Ink, and Adhesives | Community |
| Prayers In the Air | Community |
| Parachute Industry Association | Community |
| Peripheral Interface Adapter | Computer Hardware |
| Primary Interop Assembly | Computer Hardware |
| Platform for Information Applications | Computing |
| Public Internet Access | Computing |
| Plug-In Architecture | Computing |
| Parallel Interface Adapter | Computing |
| Plug-In Administrator | Computing |
| Privacy Impact Assessments | Computing |
| Peoplesoft Internet Architecture | Computing |
| Pakistan International Airlines | Country Specific |
| Personal Injury Accident | General |
| Petroleum Industry Association | General |
| Periodistas de la Industria Automotriz | General |
| Peoria International Airport | General |
| Perhaps it Arrives | General |
| PLAN IMPLEMENT ASSESS—the | General |
| Protzek instrumental analytics | General |
| Privacy Impact Assessment | General |
| Professional Intermediary and Agent | General |
| Poliqon Informasiya Agentliyi | General |
| Public Info Attack | General |
| Provider Information Assessment | General |
| Personal Insolvency Arrangement | General |
| Process Instrumentation and Analytics | General |
| Permanent Interactive Anamorphic | General |
| Planned Incremental Availability | General |
| Project Innovation Awards | General |
| Protection Innovation and Automation | General |
| Princeton In Asia | General |
| Partnership Intermediary Agreements | General |
| Porsche Inter Auto | General |
| Public and International Affairs | Governmental |
| Pain In the A** | Governmental |
| Pakistan International Airline | Governmental |
| Philadelphia International Airport | Governmental |
| Property Investors Alliance | Governmental |
| Pittsburgh Institute of Aeronautics | Governmental |
| Passport Issuing Authority | Governmental |
| Parole In Absentia | Governmental |
| Proprietary Information Agreement | Governmental |
| Plantscape Institute of America | Governmental |
| Prison Industry Authority | Governmental |
| Printing Industries Alliance | Governmental |
| Pro Islamic Alliance | Governmental |
| PIPRAIGAON | Indian Railway Station |
| Professional Insurance Agents | Insurance |
| Pass It Around | Internet |
| Pain In A** | Internet |
| Private Internet Access | Internet |
| Program of Integrative Assignments | Jobs |
| Partner In Angelicuss | Jobs |
| Primary Immunodeficiency Association | Medical |
| Performance Improvement Analyst | Medical |
| PTS-Independent Antitermination | Medical |
| Proliferative Inflammatory Atrophy | Medical |
| Pain In The Ass | Military and Defence |
| Program Integrity Assurance | Military and Defence |
| Peoria International Airport, Peoria, Illinois USA | Regional |
| Personal Internet Appliance | Softwares |
| Preinstallation Acceptance | Space Science |
| Project Impact Analysis | Space Science |
| Project Initiation Agreement | Space Science |
| Principal Investment Area | Stock Exchange |
| Pakistan International Airways | Transport & Travel |
