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(IBM)
Wikipedia definition
1. Data set (IBM mainframe)data set (archaic), dataset (preferred), is a computer file having a record organization. The term pertains to the IBM mainframe operating system line, starting with OS/360, and is still used by its successors, including the current z/OS. Those systems historically preferred this term over a file. A dataset is typically stored on direct access storage device (DASD) or magnetic tape, however unit record devices are also supported.
Read “Data set (IBM mainframe)” on English Wikipedia
Read “データセット (IBMメインフレーム)” on Japanese Wikipedia
Read “Data set (IBM mainframe)” on DBpedia

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