At 07:46 AM 3/31/2018, E. Groenenberg via cctalk wrote:
 Today I received a PDP-11 instruction video on a laser
disk, part 3 & 4.
The disk partno. is EY-5537E-V2-0001, the title says
'Introduction to the PDP-11, Internal use Only, (c) 1988' 
This one?
https://www.marktplaats.nl/a/cd-s-en-dvd-s/vinyl-overige/m1261283993-laser-…
I have LD player, digitizer, and abilities.  Midwest USA.
IVIS was a DEC Pro 350 system for interactive learning:
https://books.google.com/books?id=wi8EAAAAMBAJ&pg=PA18&lpg=PA18&…
- John