[L][O][A][D] [RETURN]
Enabled me to start following the instructions without knowing any English. What a brilliant manual it was!The manual was great for its time, a little dated now but still a decent read [2]. It was reprinted in 2018 and still available [3].
[1] https://en.wikipedia.org/wiki/Jupiter_Ace
[2] https://archive.org/details/vickers_steven_jupiter_ace_4000_...
[3] https://www.amazon.com/Jupiter-ACE-Manual-Anniversary-Progra...
Also wrote the (Jupiter and Sinclair implementations of the) languages too!
There was a time where PDF didn’t exist, there were no tools to create, let alone view or print manuals. Even when these became widespread, a number of troglodytes would get bent out of shape if their new appliance didn’t come with a (preferably bound!) paper manual. Most of these folks have either passed on or begrudgingly assimilated.