| Abbreviation | Definition |
|---|---|
| IDFA | International Dairy Foods Association |
| IDFB | International Down and Feather Bureau |
| IDIBC | Interior Designers Institute of British Columbia |
| IDLA | Indiana Drycleaning and Laundry Association |
| IDMA | Indian Drug Manufacturers Association |
| IDMA | Interactive Digital Media Association |
| IDMSA | Interior Design and Merchandising Alliance |
| IDPE | Institute of Development Professionals in Education |
| IDPO | Independent Doctors Professional Organization |
| IDRG | Israeli Diabetes Research Group |
| IDSA | India Direct Selling Association |
| IDSA | Industrial Designers Society of America |
| IDSA | Infectious Disease Society of America |
| IDSA | Infectious Diseases Society of America |
| IDTC | International Dressage Trainers Club |
| IDTTC | International Digital Terrestrial Television Consortium |
| IEA | International Association for the Evaluation of Education Achievement |
| IEBA | International Employee Benefits Association |
| IEBA | International Entertainment Buyers Association |
| IEC | Independent Electrical Contractors |