| Acronym | Definition |
|---|
| IWS | Image Web Server |
| IWS | Irish Water Spaniel (dog breed) |
| IWS | Integrated Warfare Systems |
| IWS | Information Warfare Site |
| IWS | International Wool Secretariat |
| IWS | Intelligent Workstation |
| IWS | Integrated Web Services |
| IWS | infoworkspace (General Dynamics collaboration tool set; formerly GTE) |
| IWS | InduSoft Web Studio (software) |
| IWS | Integrated Weapon System |
| IWS | Individual Weapon System |
| IWS | I'm with Stupid |
| IWS | Infantry Weapons Systems (USMC) |
| IWS | Ionizing Wet Scrubber |
| IWS | Indoor Wireless Systems |
| IWS | Internet Wrestling Syndicate |
| IWS | Individually Wrapped Slices (packaging) |
| IWS | Indiana Wind Symphony |
| IWS | Integrated Waste Solutions, Inc. (West Chester, PA) |
| IWS | Integrated Work Station |
| IWS | International Wafer Service |
| IWS | Inkjet and Web Solutions (Hewlett-Packard) |
| IWS | International Wastewater Systems, Inc |
| IWS | Inactive Waste Site |
| IWS | Integrated Water System |
| IWS | Integrated Web Service |
| IWS | Interim Wideband System |
| IWS | Integral Wind Services |
| IWS | Integrated Work Schedule |
| IWS | Inert Warhead Section |
| IWS | Insensible Water Loss |
| IWS | Integrated Weapon System Manual |
| IWS | Industry Wage Survey (USA) |
| IWS | Instrument Workshop (Australia) |
| IWS | Interoperable Wave Standard |
| IWS | Intranet Web Services |
| IWS | Interceptor Weapons School (Tyndall Air Force Base; Florida) |
| IWS | Intuitive Web Solutions, LLC (Springfield, MO) |
| IWS | Infant Warming System |
| IWS | Industrial Warehouse Service (Tuscaloosa, AL) |
| IWS | Information Worker Solutions (Microsoft) |
| IWS | Irritable Woman Syndrome |
| IWS | Interceptor & Waste Services (UK) |
| IWS | Internet World Stats (market research) |
| IWS | In-Wall Subwoofer (various companies) |
| IWS | Intelligent Web Services (project) |