| W3 | World Wide Web |
| W3C | World Wide Web Consortium |
| WABCO | Westinghouse Air Brake Company |
| Wabtec | Westinghouse Air Brake Technologies |
| WAC | Washington Administrative Code |
| WAC | Western Athletic Conference |
| WAC | WebAndCrafts |
| WAC | Women’s Army Corps |
| WAC | Warwick Arts Centre |
| WAC | Wydad Athletic Club |
| WAC | Weighted Average Coupon |
| WAC | Worked All Continents |
| WAC | Walker Art Center |
| WAC | World Archaeological Congress |
| WAC | Washington Athletic Club |
| WAC | World Aeronautical Chart |
| WAC | Warrington Central Railway Station |
| WAF | Web Application Firewall |
| WAF | Warendorf |
| WAF | Wife Acceptance Factor |
| WAF | World Architecture Festival |
| WAF | West African Resources Limited |
| WAF | Weather and Forecasting |
| WAF | World Apostolate of Fátima |
| WAF | Wana Airport |
| WAF | Women’s Action Forum |
| WAF | World Agricultural Forum |
| WAF | Welsh Automotive Forum |
| WAF | World Armwrestling Federation |
| WAF | Wallyford Railway Station |
| WAF | Women in the Air Force |
| WAICENT | World Agricultural Information Centre |
| WAIS | Wechsler Adult Intelligence Scale |
| WAIS | Western Antarctic Ice Sheet |
| WAIS | Wide Area Information Server |
| WAIS | World Association of International Studies |
| WALAMTARI | Water and Land Management Training And Research Institute |
| Walmart | named after its founder, Sam Walton |
| WAMP | Windows, Apache, MySQL, PHP/Perl/Python |
| WAN | Wide Area Network |
| WAN | Wanborough |
| wan | wan language |
| WAN | Wataniya Airways |
| WAP | Wireless Application Protocol |
| WAPDA | Water and Power Development Authority |
| WAR | Web Archive |
| WAR | Waris Airport |
| WAR | Write After Read |
| WAR | White Aryan Resistance |
| Was | Past tense of be |
| WAS | Wait A Second |
| WAS | WebSphere Application Server |
| WAS | Wiskott-Aldrich Syndrome |
| WAT | West Africa Time |
| WAT | Windows Activation Technologies |
| WAT | White Adipose Tissue |
| WAT | Waterford Airport |
| WAT | Weight, Altitude, and Temperature |
| WATS | Wide Area Telephone Service |
| WATS | World Air Transport Statistics |
| WATS | West Africa Theological Seminary |
| WATS | Washtenaw Area Transportation Study |
| WAU | Windows Anytime Upgrade |
| WAU | Women for Aryan Unity |
| WAU | Wauchope, New South Wales, Australia |
| WAV | Waveform Audio File Format |
| Wb | Weber |
| WB | Warner Brothers |
| WB | World Bank |
| WB | White Balance |
| WB | West Bengal |
| WB | White Bread |
| WB | Wheelbase |
| WB | Wet Bulb |
| WBADMIP | West Bengal Accelerated Development of Minor Irrigation Project |
| WBC | White Blood Cell |
| WBC | World Boxing Council |
| WBC | World Baseball Classic |
| WBC | Westpac |
| WBC | World Boardgaming Championships |
| WBC | Wyoming Business Council |
| WBC | Williams Baptist College |
| WBC | Warrington Borough Council |
| WBC | Waterbeach railway station |
| WBC | World Beer Cup |
| WBCs | White Blood Cells |
| WBCS | Welsh Black Cattle Society |
| WBCS | West Bengal Civil Service |
| WBCSD | World Business Council for Sustainable Development |
| WBIDC | West Bengal Industrial Development Corporation |
| WBIDC | Wire Bonded Interdigital Capacitor |
| WBIFMS | West Bengal Integrated Financial Management System |
| WBTIDC | West Bengal Transport Infrastructure Development Corporation |
| WCC | World Council of Churches |
| WCC | West Coast Choppers |
| WCC | West Coast Customs |
| WCC | Wellington City Council |
| WCC | Wound Care Certified |
| WCC | Washington Conservation Corps |
| WCC | Weak Central Coherence |
| WCC | Washtenaw Community College |
| WCC | Westchester Community College |
| WCC | Whatcom Community College |
| WCC | Windward Community College |
| WCC | Women's Christian College |
| WCC | Women in Cinema Collective |
| WCC | World Chess Championship |
| WCC | West Coast Conference |
| WCC | Warwickshire County Council |
| WCC | Worcestershire County Council |
| WCC | Waubonsee Community College |
| WCC | Wayne Community College |
| WCC | World Chlorine Council |
| WCC | World Climate Conferences |
| WCC | Woodland Community College |
| WCC | Waverley Christian College |
| WCC | West Cheshire College |
| WCC | Western Canada Cup |
| WCC | World Club Challenge |
| WCC | Western Canada Concept |
| WCC | Wiltshire County Council |
| WCC | William Clarke College |
| WCC | Wyoming Catholic College |
| WCC | Western Canadian Championship |
| WCC | World Conker Championships |
| WCC | World Curling Championships |
| WCC | Wisconsin Collegiate Conference |
| WCC | Western Cartridge Company |
| WCC | Women’s Classical Caucus |
| WCC | Women's Classical Committee |
| WCC | World Children's Choir |
| WCC | Woodbury Country Club |
| WCC | World Christian Conference |
| WCDMA | Wideband Code Division Multiple Access |
| WD | Western Digital |
| WD | White Dwarf |
| wd | Working Directory |
| WD | Walt Disney |
| WD | Well Done |
| WD | Wing Defence |
| WD | Watch Dogs |
| WD | White Dwarf |
| WD | War Department |
| WD | Western Economic Diversification Canada |
| WD | Web Dynpro |
| WD | Whipple’s Disease |
| WD | DAS Air Cargo |
| WD | Wardair Canada |
| WD | Wikidata |
| WD | Watford postcode area |
| WD-40 | Water Displacement, 40th formula |
| WDR | Wide Dynamic Range |
| WDR | Westdeutscher Rundfunk |
| WDR | World Development Report |
| WDR | Barrow County Airport |
| WDR | Western Development Region |
| WDR | Waddell & Reed Financial |
| WDV | Written-Down Value |
| WDV | Wheat Dwarf Virus |
| WDXRF | Wavelength Dispersive X-ray Fluorescence |
| WDYM | What Do You Mean |
| Web | World Wide Web |
| WEB | World English Bible |
| WEB | Warren Edward Buffett |
| WEB | Webjet Limited |
| WebDAV | Web Distributed Authoring and Versioning |
| Webel | West Bengal Electronics Industry Development Corporation Limited |
| WEF | World Economic Forum |
| WEF | Water Environment Federation |
| WEF | With Effect From |
| WEF | World Education Fellowship |
| Wells Fargo | name after is founders, Henry Wells & William Fargo |
| WEP | Wired Equivalent Privacy |
| WEP | War Emergency Power |
| Wesco | West Coast Shoe Company |
| WESCO | Western Electricity Supply Company of Orissa |
| Westpac | Western + Pacific |
| WFH | Work From Home |
| WFH | World Federation of Hemophilia |
| WFH | Work For Hire |
| WFP | World Food Programme |
| WFP | Windows Filtering Platform |
| WFP | Windows File Protection |
| WFP | Working Families Party |
| WFP | Witness For Peace |
| WFP | World Federation of Parasitologists |
| WGBH | Western Great Blue Hill |
| WhatsApp | from the greeting phrase “What’s up?” |
| WHATWG | Web Hypertext Application Technology Working Group |
| WHM | Web Host Manager |
| WHM | Western Herbal Medicine |
| WHM | Welcome Hall Mission |
| WHM | White Hat Management |
| WHMCS | WebHost Manager Complete Solution |
| WHO | World Health Organization |
| WHO | White House Office |
| WHO | Wrist-Hand Orthosis |
| WHQL | Windows Hardware Quality Labs |
| WiDi | Wireless Display |
| WiFi | Wireless Fidelity |
| WIIFM | What’s In It For Me? |
| Wiki | Wiki is a Hawaiian word meaning “quick” or “fast” |
| Wikipedia | Wiki + Encyclopedia |
| WiMAX | Worldwide Interoperability for Microwave Access |
| WIPO | World Intellectual Property Organization |
| Wipro | Western India Products |
| WISE | Wide-field Infrared Survey Explorer |
| WISP | Wireless Internet Service Provider |
| WISP | Wireless Identification and Sensing Platform |
| WISP | Wang Interchange Source Processor |
| WITSML | Wellsite Information Transfer Standard Markup Language |
| WL | Working level |
| WL | Weight Loss |
| WL | Waiting List |
| WL | WanderLust |
| WLAN | Wireless Local Area Network |
| WLL | Wireless Local Loop |
| WLL | Working Load Limit |
| WLL | West London Line |
| WLL | With Limited Liability |
| WLL | Wikipedia Loves Libraries |
| WLS | Weight Loss Surgery |
| WLS | WebLogic Server |
| WLS | West Lose Subtract |
| WLS | Weighted Least Squares |
| WLS | Wisconsin Lutheran Seminary |
| WLS | White Light Scanner |
| WLS | Westchester Library System |
| WLS | West London Synagogue |
| WLS | Whittier Law School |
| WLS | Hihifo Airport |
| WLTP | Worldwide-Harmonized Light-Duty Vehicles Test Procedure |
| WMA | Windows Media Audio |
| WMA | World Medical Association |
| WMA | Ways and Means Advances |
| WMA | William Morris Agency |
| WMA | War Measures Act |
| WMA | Weights and Measures Act |
| WMAP | Wilkinson Microwave Anisotropy Probe |
| WMD | Weapons of Mass Destruction |
| WMIC | Windows Management Instrumentation Commandline |
| WMIC | Wolfson Molecular Imaging Centre |
| WMIC | Wireless Mobile Interface Card |
| WMIC | Wireless MICrophone |
| WML | Wireless Markup Language |
| WML | Website Meta Language |
| WML | Wesnoth Markup Language |
| WML | Malaimbandy Airport |
| WML | Waste Management Licensing Regulations |
| WML | White Matter Lesion |
| WMP | Windows Media Player |
| WMV | Windows Media Video |
| WNA | World Nuclear Association |
| Wolfram Alpha | named after its founder, Stephen Wolfram |
| WOM | Word Of Mouth |
| WORM | Write-Once, Read-Many |
| WORM | Workshop on Ontologies: Reasoning and Modularity |
| WoW | World of Warcraft |
| WOW | Windows on Windows |
| WOW | Willow Airport |
| WOW | Women of the Wall |
| WP | WordPress |
| WP | Washington Post |
| WP | Word Processing |
| WP | Waterproof |
| WP | Winning Percentage |
| WP | Western Province |
| WP | White Phosphorus |
| WP | Writ Petition |
| WPA | Wi-Fi Protected Access |
| WPB | West Palm Beach |
| WPB | Workers Party of Bangladesh |
| WPB | Port Berge Airport |
| WPB | Waste Paper Basket |
| WPB | War Production Board |
| WPB | Workers’ Party of Belgium |
| WPB | Weibel-Palade Bodies |
| WPF | Windows Presentation Foundation |
| WPF | World Population Foundation |
| WPF | William Penn Foundation |
| WPF | World Puzzle Federation |
| WPF | Western People’s Front |
| WPF | Wolf Preservation Foundation |
| WPF | World Pump Festival |
| WPI | Wholesale Price Index |
| WPI | Whey Protein Isolate |
| WPI | Worcester Polytechnic Institute |
| WPI | World Policy Institute |
| WPI | Weather Protected Type I |
| WPI | Wraps Per Inch |
| WPI | Women & Politics Institute |
| WPM | Words Per Minute |
| WPM | Wheaton Precious Metals |
| WPM | Weighted Product Model |
| WPM | Wood Packaging Material |
| WPM | Windermere Property Management |
| WPM | Water Point Mapping |
| WPM | World Pantheist Movement |
| WPM | World Patent Marketing |
| WPS | Wi-Fi Protected Setup |
| WPU | William Paterson University |
| WPU | William Pitt Union |
| WPU | William Penn University |
| WPU | William Peace University |
| WPU | Western Philippines University |
| WPU | Water Treatment Unit |
| WPU | Guardia Marina Zañartu Airport |
| WRC | World Rally Championship |
| WRC | World Radiocommunication Conference |
| WRC | World Rally Car |
| WRC | Water Research Centre |
| WRC | White Ribbon Campaign |
| WRC | Worker Rights Consortium |
| WRC | WAVE Regulatory Complex |
| WRC | War Reserve Constable |
| WRT | With Respect To |
| WSD | Word Sense Disambiguation |
| WSD | Water Supplies Department |
| WSD | White Spot Disease |
| WSD | Web Services for Devices |
| WSD | Wanganui School of Design |
| WSD | Working Stress Design |
| WSD | Whitnall School District |
| WSJ | Wall Street Journal |
| WSJ | San Juan Seaplane Base |
| WSJ | Weekly Shōnen Jump |
| WTC | World Trade Center |
| WTF | Work Time Fun |
| WTF | Williamstown Theatre Festival |
| WTF | World Taekwondo Federation |
| WTFU | Where’s The Fair Use? |
| WTH | What the Hell |
| WTO | World Trade Organization |
| WTP | Water Treatment Plant |
| WTP | Willingness To Pay |
| WTP | Wireless Transaction Protocol |
| WTP | Web Tools Platform |
| WTP | Woitape Airport |
| WTP | World Trade Park |
| WVFRM | WaVeFoRM |
| WWDC | World Wide Developers Conference |
| WWDC | Wyoming Water Development Commission |
| WWE | World Wrestling Entertainment |
| WWF | World Wildlife Fund |
| WWW | World Wide Web |
| WWW | Wild Wild West |
| WWW | Wolverine World Wide |
| WWWW | World Wide Web Worm |
| WYSIWYG | What You See Is What You Get |
| WYSIWYS | What You See Is What You Sign |
