According to GC28-6704-1, IBM System/360 Operating System: Job Control Language Reference,DD means "Data Definition". Bitsavers knows all.On Sun, Sep 15, 2024 at 10:15 PM Dave Horsfall <dave@horsfall.org> wrote:On Mon, 16 Sep 2024, Rob Pike wrote:
[ The origin of the "dd" command ]
> I was told it's IBMese: Define Dataset.
Straight from IBM's JCL (Job Control Language); heck, I still remember
obscure things like "DISP=(,KEEP)" etc...
-- Dave