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The term '''data set''' or '''dataset''' is used to refer to [[computer file|file]]s on an [[IBM]] [[mainframe computer]], typically stored on [[DASD]] or [[magnetic tape]]. They are [[record-oriented file]]s.
Unlike files on [[Unix|UNIX]] systems, they are not unstructured streams of [[byte]]s but rather are organized in various logical record and block structures determined by the DSORG (data set organisation) parameter of the [[JCL]] that was used to allocate them.
For example, a '''PDS''' or '''Partitioned Data Set''' is a dataset containining multiple ''members'', each of which holds a separate sub-data set, similar to a [[directory]] in other types of [[file system]].
[[Category:Data management]]
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