Strange to see this come up now - when Accounting was cleaning out some office space down the hall a couple of weeks ago, I noticed a Friden electromechanical calculator, sadly without power cord. I didn’t think I needed more history stacked in my house, and my boss “gave” it to our new CFO for budget time as a joke. It is similar to the one used in the movie Hidden Figures. Surprised not to see Friden mentioned at some of the other web sites posted.