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UDF

   Also found in: Acronyms, Wikipedia 0.03 sec.

(1) (Universal Disk Format) A file system for optical media developed by the Optical Storage Technology Association (OSTA), www.osta.org, based on the ECMA 167/ISO 13346 standard. It was designed for read-write interoperability among all the major operating systems as well as compatibility between rewritable and write-once media. DVDs are based on UDF, and it is an option for CD-Rs and CD-RWs.

UDF is widely associated with "packet writing," because CD-RWs use UDF and packet writing to make them function somewhat like a hard disk. UDF is a file system like ISO 9660, and packet writing is one of three CD recording techniques (see packet writing).

UDF Bridge combines UDF and ISO 9660 for compatibility between both file systems. See ISO 9660.

(2) (User Defined Function) A routine that has been defined or programmed by the user of the system and has been included in a standard library of functions. In these cases, "user" typically means programmer, not end user.

UDF - Universal Disk Format
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Thompson says that eight galaxies among the several thousand in the Hubble UDF clearly meet this distance criterion and that another that 18 are likely candidates.
Hubble's infrared camera goes the distance by Cowen, R. / Science News
If the UDF is not available in the operating system, then the backup software will burn the image directly to blank CDs.
Disk imaging in Windows: increases user productivity and permits ... by Lyadvinsky, Max / Computer Technology Review
UDF Co-President, Albertina Sisulu, told the Special Committee against Apartheid on 6 july that assassinations and disappearances were mounting in South Africa.
Security Council demands disbandment of paramilitary forces in Namibia by UN Chronicle
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