This full-keyboard, non-printing electric pinwheel calculating machine has nine columns of plastic keys, colored according to the place value of digits entered. At the base of each bank of keys is a ...

Invented by Leonardo Torres in 1920, the Torres calculating machine is a machine that solves essential addition, subtraction, multiplication, and division problems using a simple manner. It was a ...

This full-keyboard direct multiplication non-printing electric calculating machine has an iron and steel case painted black, The nine columns of plastic black and white keys are colored according to ...

Jeroen van den Bos and Davy Landman honor the computer scientist Alan Turing by recreating his calculating machine with LEGOs. Kasia Cieplak-Mayr von Baldegg is the former executive producer and ...