| IA&T | Integration, Assembly, and Test 
| Others |
| IAT | I Am Trash
| Others |
| IAT | Ice Age Trail
| Others |
| IAT | Immuno Augmentative Therapy
| Others |
| IAT | Immuno Augmentive Therapy
| Others |
| IAT | Implicit Association Test
| Others |
| IAT | Import Address Table
| Others |
| IAT | Incoming Air Temp
| Others |
| IAT | INCORRECT abbreviation for International Atomic Time (see TAI)
| Others |
| IAT | Indirect Antiglobulin Test
| Others |
| IAT | Information and Technology
| Others |
| IAT | Information Assurance Technical
| Others |
| IAT | Ingenieurgesellschaft Fur Automobiltechnik
| Others |
| IAT | Initial Acceptance Test
| Others |
| IAT | Initial Accreditation Training
| Others |
| IAT | Innovative Automobile Technology
| Others |
| IAT | Institute for Advanced Technology
| Others |
| IAT | Institute of Advanced Technology
| Others |
| IAT | Institute of Ag Tech
| Others |
| IAT | Institute of Agricultural Technology
| Others |
| IAT | Institute of Animal Technology
| Others |
| IAT | Institute of Automobile Technology
| Others |
| IAT | Instructor Authorization Test
| Others |
| IAT | Insurance and Trust
| Others |
| IAT | Intake Air Temp
| Others |
| IAT | Intake Air Temperature
| Others |
| IAT | Integrated Access Terminal
| Others |
| IAT | Integrated Avionics Test
| Others |
| IAT | Intelligent Agent Technology
| Others |
| IAT | Inter Arrival Time
| Others |
| IAT | Interaction Appearance Theory
| Others |
| IAT | Interagency Aviation Training
| Others |
| IAT | Internal Air Transport
| Others |
| IAT | Internal Auditing Team
| Others |
| IAT | International ACH Transaction
| Others |
| IAT | International ACH Transactions
| Others |
| IAT | International Appalachian Trail
| Others |
| IAT | International Aqua Tech
| Others |
| IAT | International Association of Trichologists
| Others |
| IAT | International Atomic Time
| Others |
| IAT | Internet Access and Telecommunications
| Others |
| IAT | Internet Addiction Test
| Others |
| IAT | Internet Appliance Toolkit
| Others |
| IAT | Intervention Action Team
| Others |
| IAT | Intervention Assistance Team
| Others |
| IAT | Intracarotid Amobarbital Test
| Others |
| IAT | Intreprinderea de Autoturisme Timisoara
| Others |
| IAT | Intrinsic Actions Technique
| Others |
| IAT | Iowa Terminal Railroad
| Others |
| IAT | Iowa Terminal Railroad Company (formerly ITR)
| Others |
| IAT | Is A Test
| Others |
| IAT | Iso9660 Analyzer Tool
| Others |
| IAT | issued at The
| Others |
| IAT | Issued At This
| Others |
| IAT | It's About Time
| Others |