The companion faq on PDP-8 models and options contains a detailed production
history of the PDP-8 as well as a high level description of incompatabilities
between models.  This is available from:

	http://www.faqs.org/faqs/dec-faq/
	http://www.cs.ruu.nl/wais/html/na-dir/dec-faq/.html

A modest attempt at an on-line PDP-8 manual is available from:

	http://www.cs.uiowa.edu/~jones/pdp8/man/

The mailing list PDP8-Lovers@dbit.com reaches a number of PDP-8
owners and users.  This list does not accept postings from
nonsubscribers; to subscribe, send mail to PDP8-Lovers-request@dbit.com

The pdp8-lovers mailing list has previously been hosted by onelist.com,
mc.lcs.mit.edu, ai.mit.edu, zach1.tiac.net, egroups.com and yahoo.com.
The archives for these older lists should be available on dbit.com, but
currently, the best archive is at ftp://zach.dyndns.org/pub/.

Many "archival" books have included fairly complete descriptions of the
PDP-8; among them, "Computer Architecture, Readings and Examples" by
Gordon Bell and Allen Newell is among the most accurate and complete,
although notationally difficult (see Chapter 5).  Gordon Bell has put
this on the web at:

	http://research.microsoft.com/~gbell/Computer_Structures__Readings_and_Examples/