File:Punchcards1.jpg
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Pantograph keyboard
http://inventors.about.com/library/inventors/blhollerith.htm
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:56, 5 March 2008 |  | 600 × 236 (52 KB) | Trh249 (Talk | contribs) | Pantograph keyboard http://inventors.about.com/library/inventors/blhollerith.htm |
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