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Learn about what happened in business in today's past

April 19th:

1895: The Railroad Gazette publishes the first description for a business audience of engineer Herman Hollerith’s “electric tabulating machine,” a new data-processing device that uses electrical signals to read, count and sort punch cards on which data are reprensented by an array of holes. Hollerith’s company, the Tabulating Machine Co., is one of the ancestors of IBM.
Source: http://www.loc.gov/exhibits/treasures/images/0001.jpg http://www.loc.gov/exhibits/treasures/trr041.html

1903: Eliot Ness, future “G-man” and hero of the government’s war on organized crime immortalized in the movie The Untouchables, is born.
Source: http://www.ustreas.gov/education/history/events/04-apr.shtml#19

1933: The day after Pres. Franklin D. Roosevelt devalues the U.S. dollar, the stock market soars, with the Dow Jones Industrial Average leaping 5.66 points, or a near-record 9.0%, to close at 68.31.
Source: Barrie A. Wigmore, The Crash and Its Aftermath: A History of Securities Markets in the United States, 1929-1933 (Greenwood Press, Westport, CT, 1985), pp. 456; Phyllis S. Pierce, ed., The Dow Jones Averages 1885-1980 (DowJones Irwin, Homewood, IL, 1982), not paginated; http://averages.dowjones.com