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**Casio 161K Desktop Calculator**

Image Courtesy Serge Devidts, Calcuseum

Sixteen-digit capacity version of the Casio 121K calculator, introduced in late 1970. Four function, AC-Powered desktop electronic calculator with Nixie tube display. Fixed decimal at 0 through 6 digits behind the decimal point. Constant on multiply and divide. Accumulating total register that sums results of multiplication and division. Uses early Fairchild 4-chip LSI calculator chipset.