IIU
| Acronym | Definition |
|---|---|
| IIU | International Islamic University (Terengganu, Malaysia) |
| IIU | International Investment Underwriting |
| IIU | Israeli Internet Underground |
| IIU | Internet Islamic University |
| IIU | Inertial Instrument Unit (US Navy) |
| IIU | Imagery Interpretation Unit (USMC) |