File:Punchcards1.jpg

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Punchcards1.jpg(600 × 236 pixels, file size: 52 KB, MIME type: image/jpeg)

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current17:56, 5 March 2008Thumbnail for version as of 17:56, 5 March 2008600 × 236 (52 KB)Trh249 (Talk | contribs)Pantograph keyboard http://inventors.about.com/library/inventors/blhollerith.htm
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