| Abbreviation | Definition |
|---|---|
| IA | Im Allgemeinen ('Generally' in German) |
| IA | Innovative Audio |
| IAB | Interactive Advertising Bureau |
| IAB | Internet Advertising Bureau |
| IAC | Institute of Amateur Cinematographers |
| IAJ | International Association of Journalists |
| IANS | Indo-Asian News Service |
| IAPR | International Air Power Review |
| IARB | Israel Audience Research Board |
| IAS | Independent Art Structures |
| IBA | Independent Broadcasting Authority |
| IBA | Israeli Broadcasting Authority |
| IBC | International Broadcast Congress |
| IBC | International Broadcasting Convention |
| IBC | International Brocasting Channel |
| IBC | Islander By Choice |
| IBD | Investors Business Daily |
| IBE | International Business Environment |
| IBFF | International Bangkok Film Festival |
| IBFF | International Buddhist Film Festival |