There's a bunch of post recently dredging up old "computer" memories. This one made me Google to find the first thing I ever programmed on, which was, I think, an HP calculator similar to the attached picture. My high school in Illinois had it in 1977. It had a pen plotter attached, and you could write programs to draw pictures. You saved programs on magnetic cards. I still remember the commands to move the pen up and down: FORMAT 1 UP and FORMAT 1 DOWN. 44 years ago, but I think that's correct.