| Acronym | Meaning |
![](file.png) | U/L | Uplink (UPLK Preferred) |
![](file.png) | U/M | Unit Of Measure |
![](file.png) | U/M | Unmanned |
![](file.png) | U/M | Unscheduled Maintenance |
![](file.png) | U/O | Used On |
![](file.png) | U/V | Under Voltage |
![](file.png) | U/W | Used With |
![](file.png) | UA | Microampere |
![](file.png) | UB | Upper Brace |
![](file.png) | UB | UpUtility Bridge |
![](file.png) | UBE | Universal Bus Exercisor |
![](file.png) | UBIC | Universal Bus Interface Controller |
![](file.png) | UC | Unsatisfactory Condition |
![](file.png) | UCC | Universal Checkout Console |
![](file.png) | UCD | Urine Collection Device |
![](file.png) | UCN | Uniform Control Number |
![](file.png) | UCPU | Urine Collection And Pretreatment Unit |
![](file.png) | UCR | Unsatisfactory Condition Report |
![](file.png) | UCS | Universal Control System |
![](file.png) | UCS | UnUtilities Control System |
![](file.png) | UCTA | Urine Collection Transfer Assembly |
![](file.png) | UD | Update |
![](file.png) | UDB | Update Buffer |
![](file.png) | UDF | Utility And Data Flow |
![](file.png) | UDL | Updata Link |
![](file.png) | UDL | Update Link |
![](file.png) | UDMH | Unsymmetrical Dimethylhydrazine |
![](file.png) | UDMH/H | Unsymmetrical Dimethylhydrazine Hydrazine Blend |
![](file.png) | UDOP | Ultrahigh Doppler |
![](file.png) | UDS | Universal Documentation System |
![](file.png) | UER | Unique Equipment Register |
![](file.png) | UF | Microfarad |
![](file.png) | UFD | User File Directory |
![](file.png) | UG | Microgram |
![](file.png) | UHF | Ultrahigh Frequency |
![](file.png) | UHF | Ultrahigh Frequency |
![](file.png) | UL | Underload |
![](file.png) | UL | Unit Of Issue |
![](file.png) | UL | Uplink |
![](file.png) | UL | Upper Left (S-Band Antenna) |
![](file.png) | UL | Upper Limit |
![](file.png) | UL | User Interface |
![](file.png) | ULA | Fairbanks |
![](file.png) | ULL | Ullage |
![](file.png) | ULO | Unmanned Launch Operations |
![](file.png) | ULT | Ultimate |
![](file.png) | UMB | Umbilical |
![](file.png) | UMBC | Umbilical Cord Cable |
![](file.png) | UMO | Unmanned Orbital |
![](file.png) | UMVF | Unmanned Vertical Flight |