| Acronym | Definition |
|---|
| PIA | Professional Insurance Agents |
| PIA | Pakistan International Airlines (ICAO code) |
| PIA | Pain In the Ass |
| PIA | Philippine Information Agency |
| PIA | Printing Industries of America |
| PIA | Partners in Africa (Saint Paul, MN) |
| PIA | Privacy Impact Assessment |
| PIA | Primary Insurance Amount (US Social Security) |
| PIA | Pesquisa Industrial Anual (Portuguese: Annual Industrial Survey; Brazil) |
| PIA | Personal Injury Accident |
| PIA | Partnership in Action |
| PIA | Partnership Intermediary Agreement |
| PIA | Pittsburgh International Airport |
| PIA | Parachute Industry Association |
| PIA | Peoplesoft Internet Architecture |
| PIA | Peripheral Interface Adapter |
| PIA | Primary Interop Assembly |
| PIA | Pearson International Airport (Toronto, Canada) |
| PIA | Porsche Inter Auto |
| PIA | Privacy Impact Assessments |
| PIA | Plug-in Administrator |
| PIA | Public Internet Access |
| PIA | Plug-in Architecture |
| PIA | Parallel Interface Adapter |
| PIA | Pie Is Awesome |
| PIA | Personal Investment Authority |
| PIA | Pioneer Investments Austria |
| PIA | Paid In Advance |
| PIA | Prison Industry Authority (California) |
| PIA | Parole in Absentia |
| PIA | Pass It Along (Sparta, NJ) |
| PIA | Puntland Intelligence Agency (Somalia) |
| PIA | Personal Insolvency Agreement (debt management) |
| PIA | Procurement Integrity Act |
| PIA | Planned Incremental Availability |
| PIA | Property Industry Alliance |
| PIA | Payment In Advance |
| PIA | Post Indictment Arraignment (legal proceeding) |
| PIA | Preinstallation Acceptance (US NASA) |
| PIA | Primary Immunodeficiency Association |
| PIA | Philadelphia International Advisors (Philadelphia, PA) |
| PIA | Proprietary Information Agreement |
| PIA | Parlamento Indígena de América (Spanish: Indigenous Parliament of America; Bolivia) |
| PIA | Pure Internet Architecture (PeopleSoft) |
| PIA | Participatory Impact Assessment |
| PIA | Plastics Institute of America |
| PIA | Porcine Intestinal Adenomatosis |
| PIA | Proxy Interceptor Agent |
| PIA | Plant Inspection Assistant |
| PIA | Progressive Indirect Attack |
| PIA | Products in Action |
| PIA | Professional Inventors Alliance |
| PIA | Public Interest Advocate (various organizations) |
| PIA | Public Information Agency |
| PIA | Process Improvement Associates (training and management consulting company) |
| PIA | Priority Inversion Avoidance |
| PIA | Peoria, IL, USA - Greater Peoria Airport (Airport Code) |
| PIA | Pre-Incorporation Agreement (contracts) |
| PIA | Programmable Interface Adapter |
| PIA | Parent Interviews for Autism |
| PIA | Project Initiation Agreement |
| PIA | Pinewood Intelligence Agency (Roblox) |
| PIA | Particulate Impact Analyzer |
| PIA | Program Independent Assessment |
| PIA | Photometers for Imaging the Aurora (Astrid-2 spacecraft) |
| PIA | Protein Interaction Analysis |
| PIA | Propagation and Infection Analysis |
| PIA | Preliminary Interdependency Analysis (Integrated Risk Reduction of Information-Based Infrastructure Systems; EU) |
| PIA | Propellant Isolation Assembly |
| PIA | Public Information Advisor |
| PIA | Programme Implementation Agency (India) |
| PIA | Part in Assembly |
| PIA | Program Initiation Agreement |
| PIA | Pyongyang International Airport |
| PIA | Power Injected Amplifier (structured home wiring for cable TV, internet, & audio distribution) |
| PIA | Product Implementation Architecture |
| PIA | Peritonitis Index of Altona |
| PIA | Post Instructional Activity (aka homework) |
| PIA | Pre Infarct Angina |
| PIA | Photon-counting Image Acquisition |
| PIA | Partial I/O (Input/Output) Activation (computer science) |
| PIA | Power Interface Assembly |
| PIA | Perfect Information Algorithm |
| PIA | Program Initiation Authorization |
| PIA | Packet Immediate Assignment |
| PIA | Period of Insect Activity (entomology) |