Project Gutenberg 2022-11-19 Public domain in the USA. 74 Turck, J. A. V. 21004878 Origin of modern calculating machines $aUnited States :$bThe Western Society of Engineers,$c1921. deaurider and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) https://archive.org/details/originofmodernca00turcrich 20220810092918turck 1921 US en Calculators QA Text Browsing: Computers & Technology Browsing: Science - General 310620 310627 2024-08-28T12:20:12.587589 2023-09-29T12:34:19.575349 text/html text/html 306110 2022-11-19T14:52:36 text/html 5300216 2024-08-28T12:20:19.709558 application/epub+zip 5297666 2024-08-28T12:20:14.186588 application/epub+zip 177783 2024-08-28T12:20:13.376598 application/epub+zip 5375075 2024-08-28T12:20:23.405610 application/x-mobipocket-ebook 5347067 2024-08-28T12:20:18.884601 application/x-mobipocket-ebook 253245 253275 2024-08-28T12:20:11.446612 2023-09-29T12:34:18.583360 text/plain; charset=us-ascii text/plain 252947 2022-11-19T14:52:36 text/plain; charset=us-ascii 17067 2024-08-28T12:20:23.558611 application/rdf+xml 13961 2024-08-28T12:20:13.521585 image/jpeg 2427 2024-08-28T12:20:13.448589 image/jpeg 79806 2022-11-19T14:52:37 application/octet-stream application/zip 5188360 2022-11-19T14:52:37 application/octet-stream application/zip 5586126 2024-08-28T12:20:12.865593 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://www.gutenberg.org/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog