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2. Virtual Storage Access Method - Wikipedia

   en.wikipedia.org/wiki/Virtual_storage_access_method

   Virtual Storage Access Method (VSAM) [1] is an IBM direct-access storage device (DASD) file storage access method, first used in the OS/VS1, OS/VS2 Release 1 (SVS) and Release 2 (MVS) operating systems, later used throughout the Multiple Virtual Storage (MVS) architecture and now in z/OS.

3. Support programs for OS/360 and successors - Wikipedia

   en.wikipedia.org/wiki/Support_programs_for_OS/...

   IDCAMS ("Access Method Services") generates and modifies Virtual Storage Access Method (VSAM) and Non-VSAM datasets. IDCAMS was introduced along with VSAM in OS/VS; the "Access Method" reference derives from the initial "VSAM replaces all other access methods" mindset of OS/VS. IDCAMS probably has the most functionality of all the utility ...

4. Linear data set - Wikipedia

   en.wikipedia.org/wiki/Linear_Data_Set

   A linear data set (LDS) is a type of data set organization used by IBM's VSAM computer data storage system. [1]: 5 The LDS has a control interval size of 4096 bytes to 32768 bytes [2] in increments of 4096.

5. Data Facility Storage Management Subsystem (MVS) - Wikipedia

   en.wikipedia.org/wiki/Data_Facility_Storage...

   On May 19, 1992, IBM announced [10] DFSMS/MVS, 5695-DF1, replacing MVS/Data Facility Product (MVS/DFP) Version 3, 5665-XA3, Data Facility Hierarchical Storage Manager (DFHSM) Version 2, 5665-329 and Data Facility Data Set Services (DFDSS) Version 2, 5665-327. DFSMS/MVS also replaced utilities and service aids.

6. Entry-sequenced data set - Wikipedia

   en.wikipedia.org/wiki/Entry-sequenced_data_set

   An entry-sequenced data set (ESDS) is a type of data set used by IBM's VSAM computer data storage system. [1]: 5 Records are accessed based on their sequential order, that is, the order in which they were written to the file; which means that accessing a particular record involves searching all the records sequentially until it is located, or by using a relative physical address (Relative byte ...

7. OS/360 and successors - Wikipedia

   en.wikipedia.org/wiki/OS/360_and_successors

   OS/360, officially known as IBM System/360 Operating System, [1] [2] is a discontinued batch processing operating system developed by IBM for their then-new System/360 mainframe computer, announced in 1964; it was influenced by the earlier IBSYS/IBJOB and Input/Output Control System (IOCS) packages for the IBM 7090/7094 [citation needed] and even more so by the PR155 Operating System for the ...