| Abbreviation | Definition |
|---|---|
| UPD | United Programmer and Designers |
| UPG | Universal Program Generator |
| UPG | UPGrade |
| UPL | Ultra- Portable Linux |
| UPLS | Unified Patent Litigation System |
| UPLS | United Patent Litigation System |
| UPM | Uniras Picture Manager |
| UPM | Universal Permissive Module |
| UPM | Universal Planar Manipulator |
| UPM | User Program Module |
| UPN | United Programming Network |
| UPP | Upgrade Protection Plan |
| UPPER | Universal Processor Programming Environment And Runtime |
| UPSS | Universal Parcel Shipping Software |
| UPV | User Program Version |
| UPW | Uplink to Pacsats for Windows |
| UPX | Ultimate Packer for eXecutables |
| UQ | Upgrade Quotient |
| UQP | unconstrained quadratic programming |
| URC | Universal Resource Compiler |