dekatron calculator

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Dekatron — An octal base dekatron. In electronics, a Dekatron (or Decatron, or generically three phase gas counting tube or glow transfer counting tube or cold cathode tube) is a gas filled decade counting tube. Dekatrons were used in computers, calculators … Wikipedia
Sumlock ANITA calculator — The ANITA Mark VII and ANITA Mark VIII calculators were launched simultaneously in late 1961 as the world s first all electronic desktop calculators. Designed and built by the Bell Punch Co. in Britain, and marketed through its Sumlock… … Wikipedia
Nixie tube — The ten digits of a GN 4 Nixie tube. A nixie tube is an electronic device for displaying numerals or other information. The glass tube contains a wire mesh anode and multiple cathodes. In most tubes, the cathodes are shaped like numerals.… … Wikipedia

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