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 ...

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 ...

This small stylus-operated non-printing adding machine has seven chains in parallel columns. The links visible in each column are numbered from 1 to 9. A stylus is placed in a link of the chain and ...