| Abbreviation | Definition |
|---|---|
| UU | User Unknown |
| UUCP | Unix-to-Unix Copy Program |
| UUIM | Unified User Identity Management |
| UUT | Universal User Tracking |
| UV | User Visible |
| UVK | Ultimate Virus Killer |
| UVS | Universal Verification System |
| UXS | Unix Security |
| VAM | Virtual Authorization Module |
| VB | Virtual Backup |
| VBA | Virtual Base for Access |
| VCI | V-Chip Information |
| VCL | Virus Creation Laboratory |
| VD | Virus Definition |
| VDL | Virus Description Language |
| VDS | Virus Distribution System |
| VEIL | Variable Encryption and Intelligence Labeling |
| VEST | Virtual Environment for Secure Transactions |
| VFE | Version with Full Encryption |
| VHM | Virtual Hacking Machine |