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NCR 18-1 Desktop Calculator

Image Courtesy Ian Ormerod

"Little Brother" machine to the NCR 18-2, and NCR 18-3 calculators, introduced slightly later than these two earlier machines. 14-digit capacity using individual seven-segment gas-discharge display tubes, with "half-sized" zeroes for leading zero display. One accumulating memory register. Four function, with fixed decimal point settings. Utilizes small-scale integrated circuits, along with a small magnetic core memory plane for register storage. This machine was manufactured by Nippon Calculating Machine Co. (Busicom), and sold under OEM license by NCR. At this point in time, the model number of the corresponding Busicom machine is not known.