Early computing devices: Difference between revisions
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https://americanhistory.si.edu/collections/subjects/computers-business-machines | https://americanhistory.si.edu/collections/subjects/computers-business-machines | ||
== early mechanical calculating machines == | |||
17th century: | |||
* Wilhelm Schickard (1623) | |||
* Blaise Pascal (1642) | |||
* Rene Grillet (1670s) | |||
* Leibniz (1674) | |||
19th century | |||
* Charles Xavier Thomas de Colmar, ARithmometer (1820) | |||
** commercial success in Europe starting in 1850s/60s | |||
* Frank Baldwin, Baldwin Machine / T Odhner, Odhner Machine -- variable tooth calculators (1875) | |||
* Brunsviga calculator (1885) | |||
* Dorr E Felt, Comptometer (1887) -- key driven | |||
* direct multiplcation calculator (Loen Bollee) | |||
* Trinks Arithmotype printing calculator | |||
== Stanhope Demonstrator == | == Stanhope Demonstrator == | ||
Revision as of 14:23, 9 October 2025
https://americanhistory.si.edu/collections/subjects/computers-business-machines
early mechanical calculating machines
17th century:
- Wilhelm Schickard (1623)
- Blaise Pascal (1642)
- Rene Grillet (1670s)
- Leibniz (1674)
19th century
- Charles Xavier Thomas de Colmar, ARithmometer (1820)
- commercial success in Europe starting in 1850s/60s
- Frank Baldwin, Baldwin Machine / T Odhner, Odhner Machine -- variable tooth calculators (1875)
- Brunsviga calculator (1885)
- Dorr E Felt, Comptometer (1887) -- key driven
- direct multiplcation calculator (Loen Bollee)
- Trinks Arithmotype printing calculator
Stanhope Demonstrator
Harvard Mark 1
https://history-computer.com/the-history-of-harvard-mark-1/
At Harvard: https://news.harvard.edu/gazette/story/2021/07/harvards-mark-1-finds-its-new-home/