| Abbreviation | Definition |
|---|---|
| UBMX | Used Building Materials Exchange |
| UBN | Ultranet Banner Network |
| UBN | Union Banking Network |
| UBN | United Broadband Networks |
| UBN | Unity Broadcasting Network, Inc. |
| UBO | Used Boats Online |
| UBOA | Upper Bucks Orthopaedics Associates |
| UBP | Union Bancaire Privée |
| UBP | Universal Black Pages |
| UBRA | Umbrella Corporation |
| UBS | Unique Broadband Systems, Inc. |
| UBS | Used Book Store |
| UBSI | Ultrasonic Broadcasting System Inc |
| UBSI | United Brokerage Services Inc |
| UBSI | United Buying Service Inc |
| UBT | Unified Business Technologies |
| UBV | Utrecht Biologen Vereniging |
| UBW | United Brass Works |
| UBW | Uphill Both Ways |
| UBWI | United Brass Works, Inc. |