| Abbreviation | Definition |
|---|---|
| IATB | International Association of Trans Bodybuilders |
| IATD | Illinois Association of Title I Directors |
| IATF | Indian Association of Teachers of French |
| IATF | Inter Association Task Force |
| IATF | International Association of Teamwork Facilitators |
| IATL | Israel Association for Theoretical Linguistics |
| IATM | International Association of Tour Managers |
| IATO | Indian Association of Tour Operators |
| IATO | International Association of Tattoo Organizers |
| IATP | Idaho Association of TRIO Professionals |
| IATP | International Association of Trauma Professionals |
| IATR | International Association of Tamil Research |
| IATR | International Association of Transportation Regulators |
| IATS | International Association for Tibetan Studies |
| IATS | International Association of Tibetan Studies |
| IAU | International Association of Ultrarunners |
| IAU | International Association of Ultrarunning |
| IAUA | Indian Agricultural Universities Association |
| IAUA | Insurance Appraisal and Umpire Association |
| IAUA | International Alert Users Association |