For most of human history, doing arithmetic, while sometimes aided by devices like the abacus or adders, was fundamentally an act of human intelligence. In the 17th and 18th century, a few natural ...

The Burroughs Adding Machine can still be purchased today from sites like eBay, usually for between $70 and $300, or more depending on the condition of the machine. At one point the Burroughs Adding ...

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 ...