Some of the examples have been used specifically to assist in the creation and execution of other samples, notably some Cobol programs, and others have been accumulated from exercises performed by KMS-IT Limited.

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File Definitions	Useful IBM Publications
ESDS (Entry Sequenced) file definition ESDS temporary file definition KSDS (Key Sequenced) file definition KSDS Alternate Index definition KSDS Alternate Index population KSDS Alternate Path definition RRDS (Random or Numbered) file definition	OS/390 DFSMS Access Method Services for Catalogs

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