oldcalculatormuseum.com
网站标题：	The Old Calculator Web Museum
网站简介：	The Old Calculator Web Museum is a virtual museum of old electronic calculating machines. Detailed information on calculators from the earliest electronic calculators through the early 1980s is provided for each machine in the museum.
关键字：	calculator  calculators  nixie  vintage  calculator  museum  old  calculators

 

anita-calculators.info
网站标题：	Bell Punch Company & Anita Calculators
网站简介：	Brief history of the Bell Punch Company and the development of the Anita calculator: the worlds first desktop electronic calculator.
关键字：	Calculator  old  first  electronic  comptometer  ANITA  Bell  Punch  Rockwell  Uxbridge  Portsmouth  Nixie  cold  cathode  dekatron  adder  adding  machine  sumlock

 

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