<div dir="ltr"><div class="gmail_default" style="font-family:arial,sans-serif">One man's "data definition" is another's "define dataset" remembered faintly from 50 years ago.</div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,sans-serif">-rob</div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Sep 16, 2024 at 6:11 PM Tom Lyon <<a href="mailto:pugs78@gmail.com">pugs78@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">According to GC28-6704-1, IBM System/360 Operating System: Job Control Language Reference, <div>DD means "Data Definition". Bitsavers knows all.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Sep 15, 2024 at 10:15 PM Dave Horsfall <<a href="mailto:dave@horsfall.org" target="_blank">dave@horsfall.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Mon, 16 Sep 2024, Rob Pike wrote:<br>
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[ The origin of the "dd" command ]<br>
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> I was told it's IBMese: Define Dataset.<br>
<br>
Straight from IBM's JCL (Job Control Language); heck, I still remember <br>
obscure things like "DISP=(,KEEP)" etc...<br>
<br>
-- Dave<br>
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