| Intergovernmental Personnel Act | Academic & Science |
| Indefinite Particle Article | Academic & Science |
| International Persian Alphabet | Academic & Science |
| Institutul de Proiectare in Automatizari (Institute of Design in Automation) | Academic & Science |
| International Permafrost Association | Academic & Science |
| Union internationale des éditeurs | Academic & Science |
| Unión Internacional de Editores | Academic & Science |
| Internationale Verleger-Union | Academic & Science |
| Indole-3-propionic acid | Academic & Science |
| Indirect Proof Assumption | Academic & Science |
| Insolvency Practitioners Association | Accounts and Finance |
| Institute of Petroleum Accounting | Accounts and Finance |
| Ipota | Airport Code |
| International Polka Association | Associations & Organizations |
| Institute of Public Accountants | Associations & Organizations |
| Institute of Public Affairs | Associations & Organizations |
| Indian Polo Association | Associations & Organizations |
| Indian Pharmacist Association | Associations & Organizations |
| Innovative Positive Actions | Business |
| Independent Participation Agreement | Business |
| Indonesian Professionals Association | Business |
| Free Trade Agreement Port | Business |
| Innovation Passion Automation | Business |
| Institute of Practitioners of Advertising | Business |
| Investment Program Association | Business |
| Identity Policy Audit | Business |
| Innovators Patent Agreement | Business |
| Indigo Properties Australia, LTD. | Business |
| Innovative Products of America | Business |
| Investment Protection Agreement | Business |
| Institute of Professional Administrators | Business |
| Icetratt Patent Agency | Business |
| Indian Pharmaceutical Alliance | Business |
| Isopropyl Alcohol | Chemistry |
| Interactive Pedagogical Agents | Community |
| Integrated Practical Activities | Community |
| In Person Autograph | Community |
| International Polychaetology Association | Community |
| International Psychogeriatric Association | Community |
| International Phonetic Association | Community |
| International Psychoanalytical Association | Community |
| Illinois Principals Association | Community |
| Independent Pilots Association | Community |
| International Publishers Association | Community |
| Innovative Payments Association | Community |
| Intelligent Peripheral Adapter | Computer Hardware |
| Interaction Process Anlayzer | Computer Hardware |
| Independent Provider Association | Computing |
| Independent Pixel Approximation | Computing |
| Integrated Payload Analysis | Computing |
| Information Processing Architecture | Computing |
| Internet Page Acceleration | Computing |
| Internet Poetry Archive | Computing |
| Internet Protocol Adapter | Computing |
| Internet Private Foundation Austria | Computing |
| Internet Professionals Association | Computing |
| Information Protection Addendum | Computing |
| iOS App store Package | Computing |
| Illiana Pullers Association | General |
| Intelligent Personal Agent | General |
| Intelligent Personal Assistant | General |
| in Car Personal Assistant | General |
| India Pale Ale | General |
| Infidel Pale Ale | General |
| International Publishers | General |
| Islesboro Paranormal Activity | General |
| International Priority Airmail | General |
| Interim Payment Agreement | General |
| Individual Pensions Account | General |
| Image Processing Algorithms | General |
| Image Product Archive | General |
| Institutetute of Public Administration | General |
| India Pale Ales | General |
| Ingenuity Pathway Analysis | General |
| Independent Project Analysis | General |
| India Pale Alcohol | General |
| Intergovernmental Personnel Agreement | General |
| International Photography Association | General |
| iPhone Application Archive | General |
| Implementation Procedures for Airworthiness | General |
| Innovations for Poverty Action | General |
| International Photography Awards | General |
| Incredibly Palatable Ale | General |
| Incredibly Pbad Abeer | General |
| Intelligent Park Assist | General |
| Intuitive Park Assist | General |
| Ipod Adapter | General |
| Infiniti Personal Assistant | General |
| Identification Plate Approval | General |
| In Process Assembly | General |
| International Police Association | Governmental |
| Integrated Planning Act | Governmental |
| Institute of Practitioners in Advertising | Governmental |
| Institute of Public Administration | Governmental |
| Institute for Portfolio Alternatives | Governmental |
| International Purchasing Agency | Governmental |
| Information Passenger Assistant | Governmental |
| Independent Practice Association | Healthcare |
| Indian Ports Association | Indian Ministry of Shipping |
| In Paradiso Absolvo | International |
| Ilmu Pengetahuan Alam | International |
| International Probiotics Association | International |
| Instrument for Pre-Accession Assistance | International |
| International Play Association | International |
| Internet Protocol Address | Internet |
| Individual Pension Account | Jobs |
| Independent Public Accountant | Jobs |
| Independent Physicians Association | Medical |
| Independent Practitioner Association | Medical |
| Internet Porn Addiction | Medical |
| ImmunoPeroxidase Assay | Medical |
| Indicative Prescribing Amount | Medical |
| Inferior Phrenic Artery | Medical |
| Inter-Practice Agreement | Medical |
| Internal Pudendal Artery | Medical |
| International Paediatrics Association | Medical |
| Intralobar Pulmonary Artery | Medical |
| intrapulmonary artery | Medical |
| Invasive Pulmonary Aspergillosis | Medical |
| Integrated Program Assessment | Military and Defence |
| Issue Position Argument | Military and Defence |
| Intelligence Production Agency | Military and Defence |
| International Programs Acquisition | Military and Defence |
| International Phonetic Alphabet | Radio Science |
| Ipota, Vanuatu | Regional |
| Innovation Prize for Africa | Regional |
| Interprocedural Analysis | Softwares |
| Intergovernmental Personnel Action | Space Science |
| International Powerlifting Association | Sports |
| Individual Practice Association | Sports |
| Investment Promotion Agency | Stock Exchange |
| Investment Promotion Agencies | Stock Exchange |