| uha | UHarc Archive |
| uharc | UHarc Archive |
| upx | UPX Compressed File |
| ustar | Tape Archive |
| uws | UniTrader 2006 Website Archive |
| uzip | FreeBSD Compressed Disk Image |
| vbk | Veeam Full Backup Archive |
| vbm | Veeam Backup Metadata File |
| vcb | VMware Consolidated Backup Archive |
| vcn | Vacon NCDrive Package |
| vem | Micro Vault Virtual Expander File |
| vib | Veeam Incremental Backup Archive |
| vib | VMware vSphere Installation Bundle Package |
| vrb | Veeam Reversed Incremental Backup Archive |
| vsa | SWV Virtual Solution Archive |
| vsi | Visual Studio Content Installer File |
| waff | Internet Explorer for Mac Web Archive |
| war | Java Web Archive |
| warc | Web ARChive File |
| wat | Web Archive Transformation File |
| waz | Web Archive ZIP |
| wbpz | ANSYS Workbench Project Archive |
| wdz | WinDev Zip Archive |
| webpnp | Web Point-and-Print Cabinet |
| wgz | S60 Web Runtime Widget Package |
| winuha | UHarc Archive |
| wna | Whitenoise Archive |
| wpb | Windows Phone Device Manager Backup |
| wr3 | WRaptor Compressed Archive |
| wra | WRaptor Compressed Archive |
