| Acronym | Definition |
|---|
| HIU➣Health Insurance Unit |
| HIU➣Hope International University (Fullerton, CA, USA) |
| HIU➣Horseed International University (Mogadishu, Somalia) |
| HIU➣Hokkaido Imperial University (Japan) |
| HIU➣Hearing Impaired Unit (schools; various locations) |
| HIU➣High Intensity Urban (zoning; various locations) |
| HIU➣Headset Interface Unit (aviation) |
| HIU➣Humanitarian Information Unit (US Dept of State) |
| HIU➣Host Interface Unit |
| HIU➣Hong Ik University (Seoul, Korea) |
| HIU➣Hydraulic Interface Unit |
| HIU➣Hook It Up (gaming team) |
| HIU➣Homicide Investigations Unit (NYPD) |
| HIU➣Human Intelligence Unit |
| HIU➣High-Interest Unit |