| Acronym | Definition |
|---|
| IOW | Image of the Week (photography) |
| IOW | Isle Of Wight |
| IOW | In Other Words |
| IOW | Input Output Write |
| IOW | I/O Write |
| IOW | Integrity Operating Windows (various companies) |
| IOW | Islands of the World |
| IOW | International Office for Water |
| IOW | Iraq Occupation Watch (San Francisco, CA) |
| IOW | Intelligence Operations Workstation (USMC) |
| IOW | Integrated Optical Waveguide |
| IOW | Instruments of War (gaming group; Return to Castle Wolfenstein; Activision, Inc.) |
| IOW | Information Operations Warfare |
| IOW | Innovators of Wrestling |
| IOW | Idiots on Wheels |
| IOW | Institute for Occult Warfare (Nazi Germany) |
| IOW | International One Way (rental fee) |