| U |
upper limb correction for moon. |
| U.Q. |
ultra quick flashing. |
| U.S.Sur M |
U.S. Survey mile(s). |
| UAE |
United Arab Emirates |
| UBSP |
Urban Basic Services Programme |
| UDF |
United Democratic Front |
| UDI |
Unilateral Declaration of Independence |
| UFW |
Unaccounted For Water |
| UGD |
Under Ground Drainage |
| UHF |
ultra high frequency. |
| UL |
upper limb. |
| ULCRA |
Urban Land Ceiling Regulation Act |
| Uncov |
uncovers. |
| UNCSD |
UN Commission on Sustainable Development |
| UNDP |
United Nations Development Programme |
| UNEP |
United Nations Environment Programme |
| UNFCCC |
UN Framework Convention on Climate Change |
| UNIDO |
United Nations Industrial Development Organisation |
| UNSCEAR |
UN Scientific Commission on the Effects of Atomic Radiation |
| UPS |
Universal Polar Stereographic. |
| USAID |
United States Agency for International Development |
| USGS |
United States Geodetic Survey. |
| USWMS |
Uniform State Waterway Marking System. |
| UT |
Universal Time. |
| UT0 |
Universal Time 0. |
| UT2 |
Universal Time 2. |
| UTC |
Coordinated Universal Time. |
| UTl |
Universal Time 1. |
| UTM |
Universal Transverse Mercator. |
| UV |
ultraviolet |
| UWWT |
urban wastewater treatment |
| UXOs |
unexploded ordinances |
