| Acronym | Definition |
|---|
| IAI | Infection And Immunity (journal) |
| IAI | Istituto Affari Internazionali (Italian: Institute of International Affairs) |
| IAI | Institute of International Affairs (Italy) |
| IAI | Illinois Articulation Initiative (education) |
| IAI | Institute of Art and Ideas (UK) |
| IAI | International Association for Identification |
| IAI | Institut für Angewandte Informatik |
| IAI | Inter-American Institute for Global Change Research |
| IAI | Israel Aerospace Industries Ltd. (est. 1953) |
| IAI | Ibm Academic Initiative |
| IAI | International Alliance for Interoperability |
| IAI | International Arbitration Institute |
| IAI | Ibero-American Institute (est. 1930) |
| IAI | Israel Aircraft Industries, Ltd. |
| IAI | Islamic Army in Iraq |
| IAI | Independent Administrative Institution (Japan) |
| IAI | Investment Advisors International |
| IAI | Investment Advisers, Inc. |
| IAI | International African Institute (UK) |
| IAI | Immunity and Infection (American Society for Microbiology) |
| IAI | Internet Activity Index |
| IAI | Insurance Associates Incorporated (Newark, DE) |
| IAI | Integrity Applications Incorporated |
| IAI | Illinois Transferable General Education Core |
| IAI | Integrated Alternative Investments, Ltd. (UK) |
| IAI | Inco Alloys International |
| IAI | Intraamniotic Infection |
| IAI | IBM (International Business Machines Corporation) Academic Initiative (global educational program) |
| IAI | Intra Abdominal Injury |
| IAI | International Apple Institute |
| IAI | Integration Action for Inclusion |
| IAI | Israel Arms International, Inc. |
| IAI | Inactive Aircraft Inventory |
| IAI | Institute Al-Islam |
| IAI | Installation Accident Investigation (US Army) |
| IAI | Inventory Adjustment Increase |
| IAI | IAM With Additional Information |