| Abbreviation | Definition |
|---|---|
| HWY | Hundred Woman Years |
| HYMIM | How Your Mother and I Met |
| IAL | I Am Legend |
| IAN | Instrumentation Automation News |
| IANN | Irwin Allen News Network |
| IANS | Indo ASEAN News Service |
| IASE | Intermediate Advanced Spanish Exam |
| IASIP | It's Always Sunny in Philadelphia (American sitcom) |
| IBC | International Broadcasting Channel |
| IBM | International Business Machines |
| IBN | India Broadcast News |
| IBN | Intelligence Bureau News |
| IBT | International Business Times |
| IC | Integrated Circuit |
| ICDN | Indo Caribbean Diaspora News |
| ICIJ | International Consortium of Investigative Journalists |
| ICIR | Intermediate Certificate in Industrial Relations |
| ICMPA | International Center for Media and the Public Agenda |
| ICN | Independent Catholic News |
| ICN | Information Culture News |