Inventions and Businesses
Hollerith had left teaching and begun working for the United States Census Office in the year he filed his first patent application. Titled "Art of Compiling Statistics", it was filed on September 23, 1884; U.S. Patent 395,782 was granted on January 8, 1889. Patents 395,781 395,782 and 395,783 was published in the Scientific American on January 18, 1889.
Hollerith built machines under contract for the Census Office, which used them to tabulate the 1890 census in only one year. The 1880 census had taken eight years. Hollerith then started his own business in 1896, founding the Tabulating Machine Company. Most of the major census bureaus around the world leased his equipment and purchased his cards, as did major insurance companies. To make his system work, he invented the first automatic card-feed mechanism and the first key punch (that is, a punch operated by a keyboard); a skilled operator could punch 200–300 cards per hour. He also invented a tabulator. The 1890 Tabulator was hardwired to operate only on 1890 Census cards. A plugboard control panel in his 1906 Type I Tabulator allowed it to do different jobs without being rebuilt (the first step towards programming). These inventions were among the foundations of the modern information processing industry.
In 1911 four corporations, including Hollerith's firm, merged to form the Computing Tabulating Recording Company (CTR). Under the presidency of Thomas J. Watson, it was renamed International Business Machines Corporation (IBM) in 1924.
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