UO

UO is an abbreviation for:

• Hong Kong Express Airways, Chinese airline ( IATA code )
• Russian Federation in accordance with the ICAO code
• Ultima Online, an online role-playing game
• Reverse osmosis, a method for the extraction of ion -free water
• University of Oklahoma, the University of the State of Oklahoma
• University of Oregon, the University of the State of Oregon
• University of Ottawa, the University of the Canadian capital Ottawa

UO as distinguishing signs on license plate:

• Czech Republic: Okres Ústí nad Orlicí, German: Wild Sword ( discontinued)

• Disambiguation
• Abbreviation