PDP-11/20 vd one that just says pdp 11 what are the date differences?? OEM?

[Paul Birkel]

-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Noel
Chiappa
Sent: Monday, February 22, 2016 3:42 PM
To: cctalk at classiccmp.org
Cc: jnc at mercury.lcs.mit.edu
Subject: Re: PDP-11/20 vd one that just says pdp 11 what are the date
differences?? OEM?

PS: Amusing factoid: I have a PDP-11/20 price list from April 1, 1972 which
lists a "PDP-11/21"! (Versions are -CA, -CB, -CE, -CF.) It's repeated
multiple places throughout the list, which leads me to believe it's not a
typo.) No idea what that was all about.

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See:

http://bitsavers.trailing-edge.com/pdf/dec/modules/modulesAndOptions/Options
_and_Modules_List_197312.pdf

pp. 7-8.  Looks like a bunch of configurations of the 11/20.

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