uuid definition
Universally Unique Identifier (UUID) A universally unique identifier (UUID) is a 128-bit number that identifies unique Internet objects or data. A UUID is generated by an algorithm with values that are based on a machine's network address. UUIDs are used by many software companies, such as Microsoft and Apple, and are extensively used as components of Microsoftâs globally unique identifiers (GUIDs). Other UUID uses include Linuxâs ext2/ext3 file system.