File:Census pantograph punch.jpg
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Census_pantograph_punch.jpg (504 × 470 pixels, file size: 49 KB, MIME type: image/jpeg)
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English: Herman Hollerith developed mechanical tabulating machines for the 1890 Census. These machines tabulated data recorded on punch cards prepared by clerks using pantographs. The pantograph’s stylus punched holes in cards that could be read and recorded by the tabulators. Computers and magnetic tape replaced punch cards and mechanical tabulators in the 1950s. |
| Date | early 1900s |
| Source | https://www.census.gov/history/ |
| Author | U.S. Census Bureau employees |
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:17, 18 July 2017 | | 504 × 470 (49 KB) | ArnoldReinhold (talk | contribs) | User created page with UploadWizard |
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