UU

UU may refer to:

Linguistics

• "uu", an old way of spelling the letter "w" in certain Germanic languages (e.g. the Merseburg Incantations spell the name of the god Woden as Uuôdan).
• The letter combination of uu

Computing

• Unique users, may be counted as part of web analytics in determining the popularity of a website
• UUNET, Internet Service Provider commonly referred to as 'UU'
• Unix-to-Unix, as in uuencode, a data transport encoding
• Until URU, a computer game

Organizations

• LSE stock ticker symbol for United Utilities
• IATA code for Air Austral airline
• The Ulster Unionist Party (also UUP), a political party in Northern Ireland
• Union Underground, former American rock band

Religion

• Unitarian Universalism, a theologically liberal religion characterized by its support for a "free and responsible search for truth and meaning."

Education

• Uppsala University in Sweden
• University of Ulster in Northern Ireland
• University of Utrecht, alternatively known as Utrecht University, in the Netherlands
• University of Utah in the United States
• Union University in the United States
• The Unseen University, in the fictional Discworld novels of Terry Pratchett

Uu may also refer to:

• the Uu interface, UMTS air interface, which links the User Equipment to UMTS Terrestrial Radio Access Network in a UMTS network.