IWW
| Acronym | Definition |
|---|---|
| IWW | Industrial Workers of the World (labor union; known as the Wobblies) |
| IWW | Institut für Wissen in der Wirtschaft (German: Institute of Knowledge in Economics) |
| IWW | Industrial Wastewater |
| IWW | Inland Waterway |
| IWW | It Was Written (Nas album) |
| IWW | Irish Whip Wrestling |
| IWW | Inland Wetlands and Watercourses (Connecticut) |
| IWW | International Women's Week |
| IWW | Italian Women Writers |
| IWW | Internet World Wireless (trade show) |