job control in Sys V

[mullen at NRL-CSS.ARPA]

From:  Preston Mullen <mullen at NRL-CSS.ARPA>

I keep seeing hints that System V (perhaps only release 2?)
has some form of job control.  Could someone elaborate on this
and compare it with 4.2bsd job control?  I am especially
interested in job control at the user command (shell) level,
not capabilities that are only implemented in system calls.

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