| Acronym | Definition |
|---|
| WIU➣Western Illinois University |
| WIU➣Western International University |
| WIU➣Workers Industrial Union (various organizations) |
| WIU➣West Indies United (est. 1981) |
| WIU➣Westmoreland Intermediate Unit (Greensburg, Pennsylvania) |
| WIU➣Wing Interface Unit |
| WIU➣WISDN Interface Unit |
| WIU➣Weapon Interface Unit |
| WIU➣Winds Interface Unit (DSM) |
| WIU➣Wiring Interface Unit(s) |