| Acronym | Definition |
|---|
| IAP | International Airport |
| IAP | Institute of Atmospheric Physics |
| IAP | Information Age Publishing |
| IAP | Incident Action Plan (US DOT) |
| IAP | Inhibitor of Apoptosis Proteins |
| IAP | Instituto Ambiental do Paraná |
| IAP | Indoor Air Pollution |
| IAP | Independent Activities Period (MIT) |
| IAP | Internet Access Provider |
| IAP | In-Application Programming (remote updating of equipment by way of the Internet) |
| IAP | Instrument Approach Procedure |
| IAP | Intra-Abdominal Pressure |
| IAP | Immunization Action Plan |
| IAP | International Academy of Pathology |
| IAP | Islamic Association for Palestine |
| IAP | Individual Action Plan |
| IAP | Intelligent Access Point |
| IAP | Institut für Allgemeine Physik (Vienna, Austria) |
| IAP | Intestinal Alkaline Phosphatase |
| IAP | Indian Academy of Pediatrics |
| IAP | Anti-Apoptotic Protein |
| IAP | International Association of Prosecutors |
| IAP | Istituto dell'Autodisciplina Pubblicitaria (advertising self-regulation; Italy) |
| IAP | International Association of Pancreatology |
| IAP | Institution of Analysts and Programmers |
| IAP | Immunosuppressive Acidic Protein |
| IAP | In All Probability |
| IAP | Incentive Awards Program |
| IAP | Ion Activity Product(s) |
| IAP | Institut Algerien du Petrole (French: Algerian Petroleum Institute) |
| IAP | Interuniversity Attraction Poles (Belgium) |
| IAP | Intercept Access Point |
| IAP | Integrated Action Plan |
| IAP | Installation Action Plan |
| IAP | Institute of Architects Pakistan |
| IAP | International Academy of Periodontology |
| IAP | Indian Association of Physiotherapists |
| IAP | International Airline Program (American Express) |
| IAP | Institute of Arthropodology and Parasitology |
| IAP | Interacademy Panel for International Issues |
| IAP | Ink and Paper (editing) |
| IAP | Insurance Association of Pakistan |
| IAP | Instituto Argentino del Petróleo y del Gas (Argentine Petroleum and Gas Institute) |
| IAP | Inter-America and Pacific (Peace Corps) |
| IAP | Initial Assessment Period (Canadian Forces) |
| IAP | Integrated Access Point |
| IAP | Information Asset Protection (data objects protection) |
| IAP | Inferior Articular Process (vertebrae) |
| IAP | Infrastructure Assurance Program |
| IAP | Integrated Applications Promotion Programme (European Space Agency) |
| IAP | Integrated Air Picture |
| IAP | Imaging Application Platform |
| IAP | Interactive Application Processor |
| IAP | Interim Assistance Program |
| IAP | Independent Assessment Program |
| IAP | Integrated Actuation Package |
| IAP | Initial Accumulation Point |
| IAP | Interfaces for Application Portability |
| IAP | Illinois Action Project |
| IAP | Institute for Astrophysics of Paris |
| IAP | In Assignment Processing |
| IAP | International Association for Paratuberculosis, Inc. |
| IAP | Industry Assistance Program |
| IAP | Integrated Armor Package |
| IAP | Initial Approach Point |
| IAP | Independent Assessment Plan |
| IAP | Integrated Architectures Panel |
| IAP | Institute for Atomic Physics (Russia) |
| IAP | Information Assurance Panel |
| IAP | Information Architecture Plan |
| IAP | Intelligent Agent Platform (scalable cluster computing) |
| IAP | Inter-Array Processor/Processing |
| IAP | Improved Accuracy Program |
| IAP | Information Access Package (GSMinside) |
| IAP | Inter-Active Payment |
| IAP | International Army Program |
| IAP | Impact Artist Promotions, Inc (Gilbertsville, Pennsylvania) |
| IAP | Interim Authority Process |
| IAP | International Apostolic Ministries |
| IAP | Index of Administrative Publications |
| IAP | ISDN Adjunct Processor |
| IAP | Industrial-Academic Partnership |
| IAP | Internal Auditing Procedures |
| IAP | Initial Approved Plan |
| IAP | Ingénieurs À Paris |
| IAP | Interagency Airspace Protection |
| IAP | Investigacion Accion Participativa (Spanish: Participatory Action Research) |
| IAP | In-Application Purchase (Nokia) |
| IAP | Industrial Animal Production |
| IAP | International Adoption Program (various organizations) |
| IAP | Insurance Assistance Program (various locations) |
| IAP | Internet Access Plus |
| IAP | Integrated Archive Platform (Hewlett Packard) |
| IAP | Intrapartum Antibiotic Prophylaxis |
| IAP | Internet Application Platform (software) |
| IAP | International Agricultural Programs (various locations) |