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In the late 1970s were were distributing our user manuals over a combination of computer dedicated backbone communications network and phone lines to deliver the books to the users who could then view them on their VT-100 screens or print them out on their terminals, Diabalos, or high speed line printers. The files were stored on DEC PDP-10 computers and the network was controlled by DEC PDP-8 and RSTS-11 machines.
While the files themselves were not encrypted, they were protected in that not everyone could get to them. Additionally, it required a username and password to get to the area to request the file. Sometimes it also required file-level passwords but then it was an all-or-nothing situation rather than as this patent works, page-by-page.
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