I was reading my own Terak web page, and remembering that I'd read Doug Gale's history of computing at Cornell:
https://ecommons.cornell.edu/bitstream/handle/1813/36810/00_TheEarlyYearsOfAcademic_epilogues1-4_v18Apr17.pdf and it mentions (at page 3.23) a "how to repair a Terak" video they made there, and he claims it was distributed to other universities that were also using Teraks. Has anyone ever seen this tape? - John
