For sale 128K Core RAM Industrial PDP 11/40 Massbus System

Ethan Dicks ethan.dicks at
Mon Oct 31 14:41:46 CDT 2016

On Mon, Oct 31, 2016 at 3:36 PM, Ian S. King <isking at> wrote:
> I think we had this discussion a while back, but I know that my 11/20 just
> says 'PDP-11' on the front panel.  I've also seen them with '11/20', which
> is almost certainly a later naming as the -11 line grew.

Yes.  Mine says "11/20" and has some later-rev CPU boards (-YA) that I
think date to 1972.


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