FORTRAN IV Manual (1982), adapted by Rafko Adrinek and published by Iskra Delta!
#FORTRAN was the first widely adopted “standard” programming language, especially popular during the 1960s and 70s — the punch card era.
Back then, it powered massive mainframes, and its legacy still lives on today in modern supercomputer programming!
@muzej I used this as my first programming manual: https://plus.cobiss.net/cobiss/si/sl/bib/16922 #fortran