| W | Tungsten |
| W | Watt |
| WAN | Wide Area Network |
| WAP | Wireless Application Protocol |
| WAV | Waveform Audio |
| WB | Weak Base; Wide Band |
| WBEM | Web-Based Enterprise Management |
| WBS | Work Breakdown Structure |
| WBSEM | Wire Bonder Specific Equipment Model |
| WCDMA | Wireless Code Division Multiple Access |
| WDM | Wavelength Division Multiplexing |
| WDX | Wavelength-Dispersive X-ray Spectroscopy |
| WDXA | Wavelength-dispersive X-ray analysis |
| WEC | Wafer environment control |
| WEDE | Wireless Enterprise Delivery Environment |
| WEP | Wired Equivalent Privacy |
| WFT | Wafer fabrication template |
| WIB | Within-batch |
| WIP | Work in process; work in progress |
| WIS | Water induced shift |
| WITNESS | Wireless Integrated Terminal & Network Experimentation & Services |
| WIW | Within wafer |
| WIWNU | Within wafer nonuniformity |
| WLAN | Wireless Local Area Network |
| WLBI | Wafer-level burn-in |
| WLT | Wafer-level test |
| WMF | Windows Metafile image format |
| WMI | Windows Management Instrumentation |
| WML | Wireless Markup Language |
| WMT | Windows Media Technology |
| WNP | Waste Neutralization Plant |
| WORM | Write Once Read Many |
| WPC | Wafer Process Chamber |
| WPG | WordPerfect Bitmap image format |
| WPH | Wafers per hour |
| WSDL | Web Services Description Language |
| WSI | Wafer-scale integration |
| WTC | Wafer transfer chamber |
| WTW | Wafer-to wafer |
| WTWNU | Wafer-to wafer nonuniformity |
| WUSB | Wireless Universal Serial Bus |
| WVR | Water Vapor Regained |
| WWW | World Wide Web |
| WYSIWYG | What You See Is What You Get |
| W/B | Wire Bonding |
| W/G | Wave Guide |
| W3C | World Wide Web Consortium |
| W-BIT | Wait-bit |
| WeatherML | Weather Mark-up Language |
| WebDAV | Web Distributed Authoring and Versioning |
