I was casually browsing the Bitsavers archive and I came across these two manuals for VAX APL. There is some interesting information in there, especially relating to how a user session was conducted in 1991 using the DEVwindows client.
https://archive.org/details/bitsavers_decvaxlangsersGuideJun91_22812555 https://archive.org/details/bitsavers_decvaxlangnstallationGuideJan90_3170871 Regards, Elias
