| Acronym | Definition |
|---|
| IW | Infinity Ward (video game studio) |
| IW | Isle of Wight (UK) |
| IW | Institut der Deutschen Wirtschaft (German: Cologne Institute for Business Research) |
| IW | I Will (Beatles song) |
| IW | Information Worker |
| IW | Information Warfare |
| IW | Irregular Warfare |
| IW | Intentional Walk (baseball) |
| IW | Individually Wrapped (packaging) |
| IW | Intelligence Wing (USAF) |
| IW | Irish Wolfhound |
| IW | Injured Worker |
| IW | Industrial Waste |
| IW | Internet Week |
| IW | Information Week (magazine) |
| IW | Interchangeable With (aircraft technical data) |
| IW | Individual Weapon |
| IW | Initial Weight |
| IW | Insulated Wire |
| IW | Inside Wiring (telecommunications) |
| IW | Intermediate Water |
| IW | Internal Wiring (telecommunications) |
| IW | In Warranty |
| IW | Integrated Waveform (military catellite communications) |
| IW | It's Walky! (webcomic) |
| IW | Indianapolis Woman (magazine) |
| IW | Induction Welding |
| IW | Issue Window |
| IW | Iron Wolf (amusement park ride) |
| IW | Infiltrator Wing (Star Wars fan club) |
| IW | Iterative Waterfilling (algorithm) |
| IW | Intercot West (Disney) |
| IW | Infernal Wakening (gaming clan) |