UU or uu may refer to:
Arts and media Unseen University, in the fictional Discworld novels of Terry Pratchett Undead Unluck, a shorthand for the manga by Yoshifumi Tozuka The Mind Robber, a 1968 Doctor Who serial (production code UU)
Businesses
United Utilities (LSE stock symbol UU) Air Austral (IATA airline code UU)
Language "uu", an old way of spelling the letter "w" in certain Germanic languages, including Old English The letter combination of uu
Science and technology UUNET, Internet Service Provider commonly referred to as 'UU' Unique users, may be counted as part of web analytics in determining the popularity of a website UMTS air interface or "Uu interface", which links User Equipment to the UMTS Terrestrial Radio Access Network Unix-to-Unix, as in uuencode, a data transport encoding .uu, a compressed archive file extension, associated with uuencode
Universities Ulster University in Northern Ireland Ulster University F.C. Union University in Jackson, Tennessee, United States University of Utah in Salt Lake City, Utah, United States Uppsala University in Sweden Utica University in Utica, New York, United States Utrecht University in the Netherlands Uttaranchal University in Uttarakhand, India
Other uses Union of Utrecht (Old Catholic), a federation of Old Catholic churches Unitarian Universalism, a theologically liberal religion characterized by its support for a "free and responsible search for truth and meaning." U'u a war club from Marquesas Islands Uudenkaupungin Urheilijat, a Finnish basketball team, now known as Korihait
See also
VV (disambiguation) W (disambiguation) 2U (disambiguation) U2 (disambiguation)