| Acronym | Definition |
|---|
| IIJ➣Internet Initiative Japan Inc. (Internet service provider) |
| IIJ➣Indo-Iranian Journal |
| IIJ➣Internet Initiative Japan |
| IIJ➣International Institute for Journalism |
| IIJ➣Is It Jazz (Boston band) |
| IIJ➣Indian Institute of Jewellery (est. 2004; India) |
| IIJ➣Industrial Ink Jet (printing technology) |