| Abbreviation | Definition |
|---|---|
| UOL | Uniform Object Locator |
| UONE | Unified Open Network Exchange |
| UOP | User Operation Prohibition |
| UOS | Universal OPC Server |
| UOS | Upstream Optimization Suite |
| UPC | Universal Product Codes |
| UPI | Unique Public Identifier |
| UPL | Unit Price List |
| UPS | Ultra Perfect Service |
| UPS | Unintentional Packet Switch |
| UPS | Un-interruptable Power Supply |
| UPS | User Profile System |
| UPS | Usually Pretty Slow |
| UPSR | Unidirectional Path Switch Ring |
| URB | Usb Request Block |
| URC | Uniform Resource Characteristic |
| URD | Url Rendezvous Directory |
| URI | Universal Resource Identifier |
| URL | Uniform Resource Locator |
| URPF | Unicast Reverse Path Forwarding |