Marchant Calculating Machine Co. Description This full-keyboard, non-printing electric pinwheel calculating machine has nine columns of plastic keys, colored according to the place value of digits ...

The Marchant Model 8EFA sold from at least 1951 until at least 1958. Location Currently not on view Credit Line Gift of SCM Corporation, Business Equipment Division date made 1952 ID Number MA.335380 ...

Grant’s difference engine was invented in 1876 by George Grant. It was a calculating machine and was invented as a way to advance the current calculating machine technology. It used the latest ...