Date   : Mon, 03 Jun 1985 09:00:00-EST
From   : Bj|rn Larsen <blarsen@oslo-vax.ARPA>
Subject: Re: TOPS20 style parsing 

There is no such thing as a PDP-20 computer.
The processor running TOPS-20 is a PDP-10, most commonly
a model KL10 (on DECSYSTEM-2060's) or a KS10 (on DECSYSTEM-2020's).