TEU Twenty-Foot Equivalent Unit, a unit of measure for containerized cargo capacity
Tropical Timber 83
International Tropical Timber Agreement, 1983
Tropical Timber 94
International Tropical Timber Agreement, 1994
U
UAE
United Arab Emirates
UDEAC
Central African Customs and Economic Union
UHF ultra-high-frequency
UK
United Kingdom
UN
United Nations
UN-AIDS
Joint United Nations Program on HIV/AIDS