The computer lab at Alabama I first worked in was actually a roomful of terminals hooked to an IBM 3081d mainframe. One wall of the room had a long shelf attached, on which was approximately 12 linear feet of documentation for VM/SP, Rexx, Xedit, Mail, FORTRAN 77, and God knows what else, all in one enormous expandable “binding”. You don’t see that anymore.
It was that culture of documentation that led IBM to ship each PC with a commensurately excellent set of docs weighing in at something like 4,000 pages.
My MacBook Pro came with a thin brochure. Of course, there was no Internet to speak of in 1981, either.