| Abbreviation | Definition |
|---|---|
| UBX | Used Boat eXchange |
| UC | UCWeb Inc |
| UC | Umbrella Corporation |
| UC | Unified Communications |
| UC | Unified Conglomerate |
| UC | Unincorporated Company |
| UC | Universal Century |
| UC | Universal Creative |
| UCAC | Urgent Care Assurance Company |
| UCAR | University Corporation for Atmospheric Research |
| UCB | United Collection Bureau, Inc. |
| UCB | United Colors of Benetton |
| UCB | Upright Citizens Brigade |
| UCBC | Union City Body Company |
| UCBU | Unified Communications Business Unit |
| UCC | Ueshima Coffee Company |
| UCC | Ueshima Coffee Corporation |
| UCCI | United Church Camps Inc |
| UCCI | United Concordia Companies Inc |
| UCCI | United Concordia Companies, Inc |