- 1. Universal Disc Format. A disc format for optical media (such as
cds and dvds) which is
designed to be supportable by any operating system and not be tied to a
single operating system.
UDF is defined by ISO/IEC 13346 (also known as ECMA-167) and is widely viewed as a successor to ISO 9660 (which defined the file system for CD-ROMs).
For more information see:
- 2. User Defined Function. Typically used to describe the ability for users to create their own functions for use in Microsoft Excel.