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Physical Sequential

<file format> (PS, QSAM, Queued Sequential Access Method) The simplest data set on an IBM mainframe.

Sequential files can only be read or written from the beginning: they do not support random access.

[Why "Queued"?]

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physical address physical addressing physical layer physical memory physical memory address	PS QSAM Queued Sequential Access Method	Physical Transport Network Physics Analysis Workbench PI PIC pi-calculus