Early computing devices: Difference between revisions
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* direct multiplcation calculator (Loen Bollee) | * direct multiplcation calculator (Loen Bollee) | ||
* Trinks Arithmotype printing calculator | * Trinks Arithmotype printing calculator | ||
context of Babbage's difference engine (never really realized) and George Scheutz's printing difference engine (which worked) | |||
* https://repository.si.edu/items/d3bd18bb-9a77-4ca1-82c9-54db5f6e6d42 | |||
== Stanhope Demonstrator == | == Stanhope Demonstrator == | ||
Latest revision as of 14:29, 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
context of Babbage's difference engine (never really realized) and George Scheutz's printing difference engine (which worked)
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/