My high school computer was a slide rule, when it wasn't a pencil and paper. When I made it to college, there were two computers (that I know of ) on campus. Both programmed with punch cards. I managed to use up a full five minutes of core time, and use up the entire computing budget for the psychology department, in the process of trying to do a statistical analysis for a friend. It turned out the instructions for the subroutine had the variables in the wrong order.
Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.