Dynamic Support System was a debugging facility in OS/VS1 and OS/VS2, roughly 
equivalent to Time Sharing Support System in TSS/360.


--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

________________________________________
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of Jay 
Maynard [jaymayn...@gmail.com]
Sent: Tuesday, December 6, 2022 7:21 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Computers

OK, this is a new one on me. What's DSS?

On Tue, Dec 6, 2022 at 6:09 AM Seymour J Metz <sme...@gmu.edu> wrote:

> MVS/SE installed on an OS/VS2 base; for R1 it was 3.7 with prerequisite
> selectable units and for R2 it was 3.8 with prerequisite selectable units.
> In each case a prerequisite SU killed DSS. MVS/SP replaced MVS/SE
>

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