UDF

UDF may refer to:

Astronomy

• Ultra Deep Field, a view of the distant universe taken in 2004 by the Hubble space telescope
  • UDF 423, a distant spiral galaxy
  • UDF 2457, a red dwarf star

Computing

• Universal Disk Format, an operating-system-independent file system commonly used on DVD and other digital media
• Uniqueness Database File, a Windows XP Professional configuration text file
• User-defined function, a function provided by the user of a program or environment

Organizations

Politics

• United Democratic Forces (ОДС), an electoral alliance in Bulgaria
• United Democratic Forces of Belarus, a coalition of political parties participating as the main opposition group during the 2006 presidential election
• United Democratic Front (Botswana)
• United Democratic Front (Kerala), India
• United Democratic Front (Mizoram), India
• United Democratic Front (Malawi)
• United Democratic Front (Namibia)
• United Democratic Front (Pakistan)
• United Democratic Front (South Africa)
• United Democratic Front (South Sudan)
• United Democratic Forum Party, a former political party in Kenya
• Union pour la Démocratie Française (Union for French Democracy), a former centrist pro-European French political party

Military

• Ulster Defence Force, a paramilitary group in Northern Ireland
• Union Defence Force (South Africa), the predecessor of the South African Defence Force from 1912 to 1957
• Union Defence Force (UAE), the armed forces of the United Arab Emirates

Other organizations

• United Dairy Farmers, an American chain of ice cream shops

Other uses

• Unducted fan, another name for a propfan engine
• United Defense Force, a fictional global military in the manga All You Need Is Kill and its film adaptation Edge of Tomorrow
• Ural Delay Factor, When your sidecar attracts attention from bystanders, thereby delaying your departure.

See also

• Union of Democratic Forces (disambiguation), several political parties