| Abbreviation | Definition |
|---|---|
| UBR | Uniform Business Report |
| UBR | User Business Requirement |
| UBT | Unincorporated Business Tax |
| UC | Undiscovered Concept |
| UC | Unit Cost |
| UC&P | Up Close and Personal |
| UCA | Unified Corporate Authority |
| UCA | United Canadian Alliance |
| UCAA | Uniform Certificate of Authority Application |
| UCB | Unofficial Coffee Break |
| UCITS | Undertakings for Collective Investment in Transferable Securities |
| UCL | Upper Control Limit |
| UCM | Use Case Map |
| UCP | Under Certification of Posting |
| UCV | Unilevel Commissionable Volume |
| UDRP | Uniform Domain-Name Dispute-Resolution Policy |
| UDT | User Defined Type |
| UED | Unplanned Emergency Days |
| UEM | Un-original Equipment Manufacturer |
| UEM | Used Equipment Marketplace |