Editing Difference engine (section)

== External links ==
{{Commons category|Difference engines}}
* [https://www.computerhistory.org/babbage/ The Computer History Museum exhibition on Babbage and the difference engine]
* [https://www.meccano.us/difference_engines/rde_1/ Meccano Difference Engine #1]
* [http://www.meccano.us/difference_engines/rde_2/index.html Meccano Difference Engine #2]
* [https://sites.google.com/site/babbagedifferenceengine/howitwasintendedtowork Babbage's First Difference Engine – How it was intended to work]
* [http://sites.google.com/site/babbagedifferenceengine/analysisofexpenditureondifferenceenginen Analysis of Expenditure on Babbage's Difference Engine No. 1]
* [https://satyam.com.ar/Babbage/en/index.html Difference engine workings with animations]
* [https://web.archive.org/web/20100311120130/http://www.powerhousemuseum.com/collection/database/?irn=150269&img=146773 Difference Engine No1 specimen piece at the Powerhouse Museum, Sydney]
* [https://www.xrez.com/case-studies/exhibition/babbage-gigapixel-difference-engine/ Gigapixel Image of the Difference Engine No2]
* [https://www.youtube.com/watch?v=YtZCYnBlZpk Scheutz Difference Engine in action video.  Purchased by the Dudley Observatory's first director, Benjamin Apthorp Gould, in 1856. Gould was an acquaintance of Babbage. The Difference Engine performed astronomical calculations for the Observatory for many years, and is now part of the national collection at the Smithsonian.]
* Links to videos about Babbage DE 2 and its construction: {{cite web |title=Computer Histories: To Learn More |url=http://www.computerhistories.org/ToLearnMore.html |website=www.computerhistories.org|at=Topic 5 - Computers in the Steam Era (Not Hackers But Clackers)}}

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[[Category:1822 introductions]]
[[Category:Addition]]<!-- the only thing a 'difference' engine does! -->
[[Category:Articles containing video clips]]
[[Category:Charles Babbage]]
[[Category:Collection of the Science Museum, London]]
[[Category:Computer-related introductions in the 19th century]]
[[Category:English inventions]]
[[Category:Mechanical calculators]]
[[Category:Replicas]]
[[Category:Subtraction]]<!-- hand calculated -->