I get the impression
that there is NO effort by any official archive to collect manuals and
such
Stanford Library special collections have the Ampex and Apple archives,
which contain manuals.
The Charles Babbage Institute at the University of Minnesota as well as
the institution I work for (The Computer History Museum) have extensive
manual collections. Test equipment is out of the scope of CBI or CHM's
collecting scope, though.
test equipment seems to be a poorly covered area in
the museum
and archive world.
But seems to be getting coverage from private collectors and some companies
(like Agilent).
If there were significant numbers of people from universities at this conference,
you should have noticed that they have problems enough trying to fund the archiving
of the contents that their own institutions, without actively collecting on
the outside.
This reminds me of a friend from years ago that was a fan of steam traction engines.
No "official" institution collected documentation on them, but there were
preservation
organizations that kept their own archives. The problem, of course, is if the society
is disbanded without a long-term recipient for the material collected.