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 ...

This manually operated, non-printing stepped drum calculating machine has a metal mechanism and exterior, painted black on the outside. It fits snugly in a wooden case, and has a slate on a hinged ...

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 ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. In 1642, French mathematician Blaise Pascal invented a calculating machine that could add and ...