| Acronym | Meaning |
 | WINSOCK | Windows Socket |
| WINTEL | Windows/Intel |
| WIT | Wireless Information Terminal |
| WLAN | Wireless Local Area Network |
| WLANA | Wireless LAN Association |
| WMF | Windows Meta File |
| WML | Wireless Markup Language |
| WNIU | Wireless Network Interface Unit |
| WORM | Write Once Read Many |
| WOSA | Windows Open Services Architecture |
| WP | WordPerfect |
| WPA | Wi-Fi Protected Access (WPA And WPA2) |
| WRAM | Windows Random Access Memory |
| WSDL | Web Services Description Language |
| WWW | World-Wide Web |
| WYSIWYG | What You See Is What You Get |
| WYSIWYP | What You See Is What You Print |
| XDSL | X Digital Subscriber Line |
| XGA | Extended Graphics Array (Adapter) |
| XMI | XML Metadata Interchange |
| XML | Extensible Markup Language |
| XMLC | Extensible Markup Language Compiler |
| XMS | Extended Memory Specification |
| XPS | XML Paper Specification |
| XSL | Extensible Style Language |
| XT | Extended |
| XTA | XT (Extended) Attachment |
| XUL | XML-based User Interface Language |
| Y2K | Year 2000 |
| YAHOO | Yet Another Hierarchical Officious Oracle |
| YTD | Year To Date |
| ZAW | Zero Administration For Windows |
| ZCAV | Zoned Constant Angular Velocity |
| ZDI | Zero Day Initiative |
| ZIF | Zero Insertion Force |
| ZV | Zoomed Video Port |
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