Students’ calcs in the 70s/80s

[lrdheat]

In 1970, our high school in Westport, CT had an HP 9100A with a plotter! This was so much fun to program, and employ the plotter. My best friend and I thought that it would be so neat to have something like that at our homes. It did not occur to us that much more capable hand held devices would be an eventuality, including symbolic math!