In the twitter account of the guru who owns the degenerateconic.com website, he refers to a paper published in 1966 by Martin, I assume the precursor to Marriet Martin. It includes a complete computer program in Fortran for determining space trajectories for vehicles, this is the oldest Fortran I have ever seen, I have worked on a lot of 1968 code from USC Powell's famous group, but not this old.
It is interesting to read the problems they encountered.
I did use punch cards in 1976 at Newcastle University and the long slog to the computing center.
I enclose the paper for anyone who wants a historical read.
This is 20 years before the PC.