pbirkel@gmail.com
Veteran Member
It turns out that it's available on loan from the Internet Archive, for free:Campbell-Kelly, Martin, ICL: A Business and Technical History, 1989, 0-19-853918-5
Huh, that has got a little expensive.
https://archive.org/details/iclbusinesstechn0000camp
Interesting, but not $75 USD worth. End in 1984 when it became part of the STC Group.
I used the free Thorium reader under Win10. No problems. I was originally going to try the encrypted PDF but when Adobe threatened to review my entire file system and possibly "take over" other files I, umm, declined the opportunity. Caveat emptor!