UU or uu may refer to:
UUCP is an abbreviation of Unix-to-Unix Copy. The term generally refers to a suite of computer programs and protocols allowing remote execution of commands and transfer of files, email and netnews between computers.
UUNET, founded in 1987, was one of the largest Internet service providers and one of the early Tier 1 networks.
Uusimaa (Finnish: [ˈuːsimɑː]; Swedish: Nyland [²nyːland]; both lit. "new land") is a region of Finland.
Uuden Musiikin Kilpailu (abbreviated UMK, English: Contest for New Music) is an annual music contest organised by the Finnish public broadcaster Yle.
Uummannaq Island (Greenlandic: Uummannap qeqertaa) is a small (12 km2) island in the Qaasuitsup municipality in northwestern Greenland.
Uummannaq is a town in the Avannaata municipality, in central-western Greenland. With 1,282 inhabitants in 2013, it is the eleventh-largest town in Greenland, and is home to the country's most northerly ferry terminal.
Uuencoding is a form of binary-to-text encoding that originated in the Unix programs uuencode and uudecode written by Mary Ann Horton at UC Berkeley in 1980, for encoding binary data for transmission in email systems.
Uu... Kodathara? Ulikki Padathara? (English: A Knock? Will Exit?) (alternative spelling: Oo Kodathara?
Uusikaupunki (Finnish pronunciation: [ˈuːsiˌkɑupuŋki], Swedish: Nystad), is a town and municipality of Finland.