Re: Let me guess, that last one was an academic?
I am pretty sure that Fortran started out to use only 1-72. The ability to add line-numbers in columns 73-80 came a little later.... If memory serves ( but sometimes it can only volley at all well) the changeover was about 1970 or so. Since I can remember writing line numbers on the cards and only later being able to use the end columns..... Dropped a box containing a ~4000 line program down a stairwell once. Luckily it was AFTER numbered columns were available...
Long ago in a galaxy far far away....