The machines are coming for our livelihoods, Dear Readers. That was the fear a century ago with the 1923 play “The Adding Machine” by Elmer Rice. And that sentiment still holds true today with many ...

This full-keyboard printing manual adding machine has a steel frame painted black, with the portion under the keyboard green. There are eight columns of color-coded ...

This small, stylus-operated non-printing adding machine has a black steel frame and seven metal chains. A stylus is placed in the link next to a digit and pulled down to the bottom of the column to ...