Back to Stanford Computer Science Computer History Display pages . To a phototour of the displays of the Stanford Computer Science Computer History Display phototour , most photographs courtesy of Nuriya Janss, July 1999. Integrated circuit chip. This Calculator was used by Professor George Forsythe at Stanford. It provides addition, subtraction, multiplication and division, all performed mechanically.
Results show on the carriage, as does one of the factors used in multiplication, or the divisor.
This machine performed essential the cranking operation of earlier calculators, such as the Monroe machine, with single button pushes. Frank Stephen Baldwin 1839-1925. This 10-key calculator provides accurate manual computation. Each complete forward turn of the large crank on the right will add the value set into the 8 x 10 keys into the bottom register of the carriage. The top register counts the turns.