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Short videos

6:48
How the Comptometer Works
36.3K viewsJan 30, 2012
YouTubeMechanicalComputing
5:01
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2.2K viewsNov 7, 2023
YouTubeMirko Kulig
10:07
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0:39
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158.4K views10 months ago
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YouTubeSteve Daly
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