UDF

The abbreviation UDF stands for:

Universal Disk Format, a platform-independent file system
User Defined Function, a user-defined function
Uniqueness Database File, a text file for unattended software installations
UHF Direction Finder, a radio direction-finding method to determine a QDM
Unducted fan, an engine in the form of aircraft
Union Defence Force, a former army of the Union of South Africa
Ulster Defence Force in Ireland
Union démocratique fédérale, French for Federal Democratic Union, a political party in Switzerland
Union pour la démocratie française, a political party alliance in France
United Democratic Front (India)
United Democratic Front (Malawi )
United Democratic Front (Namibia)
United Democratic Front (South Africa)
United Front for Democratic Change, a rebel group in Chad
Unrecognized by a friendly country, illegal adventure travel

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