Paul Gilmartin <[EMAIL PROTECTED]>  writes:

Was this, then, even before passed data sets existed?  There was no
other way to pass data from one job step to another?  (Did jobs
even have multiple steps?)

but, agreeable as it is to describe the privations of our salad days, things were never quite so bad. Even OS PCP (Primary Control Program), which preceded MFT, supported multiple job steps. The sequence translate==>link==>execute (CLG) long antedates the System/360.

Only in the most primitive situations was it necessary or common to use cards for anything but source-program and data entry. Card images written to and read from magnetic tapes were used all but ab initio under OS/360.

John Gilmore
Ashland, MA 01721-1817
USA

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