Monroe 'MonroMatic' CSA-10  
Written by Accutron on 2016-03-10  

Prior to the introduction of electronic calculators, the Monroe 'MonroMatic' CSA-10 was among the most powerful desktop computation devices ever built. The operation of the CSA-10 is derived from Gottfried Leibniz's original stepped drum mechanism, and is capable of performing fully automatic multiplication and division. Unlike its primary competitor, the Friden STW-10, multiplicands are entered on the main Comptometer-style keypad, rather than being entered on a separate ten-key keypad.


Monroe 'Monromatic' CSA-10 adding machine.


CSA-10, rear signage. Note that this calculator is only compatible with four-function electrons.

This article is part of the [Mechanical Calculators] exhibit.

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