On Feb 27, 2020, at 8:26 PM, Nigel Johnson via cctalk
<cctalk at classiccmp.org> wrote:
 More in the trivia department, the DA15 was used for AUI interconnection in the 10base-5,
-2, and early -T days, as well as analog joysticks.
 I'm surprised to see wikipedia saying that the high-density ones had DA to DE
designations, I have only seen them in catalogs with full part numbers.  Could this be a
backronym-style regression? 
DA through DE designates the shape of the connector shell, so this makes sense.
As the article mentions, D-sub shells were also used for mixed pin inserts, such as the
pin plus coax combinations used in early workstation monitor connectors.  Same story:
standard shell, different pin insert within that shell.
        paul