Herman Hollerith (1860–1929) was an American inventor, engineer, and statistician who developed an electromechanical tabulating system based on punched cards. His machines transformed the way large volumes of data were counted and analyzed, most famously by accelerating the 1890 United States Census, and the company he founded later became a core part of IBM. [1]
Early life and education
Herman Hollerith was born on February 29, 1860, in Buffalo, New York, to German immigrant parents. He studied at the City College of New York and later earned an engineering degree from the School of Mines at Columbia University in New York City. [1] His academic training in engineering and statistics prepared him for early work with the U.S. Census Bureau, where he first encountered the challenge of processing enormous quantities of population data by hand.
The tabulating machine
Working from the observation that manual tabulation of census returns was slow and error-prone, Hollerith devised a system that recorded data as patterns of holes punched into stiff paper cards. An electromechanical reader detected the holes by completing electrical circuits, advancing counters and sorting the cards accordingly. [2] He patented the method in the late 1880s and demonstrated its speed and reliability in competitive trials.
The system's decisive success came with the 1890 United States Census, when Hollerith's machines processed the returns far faster than earlier hand methods, producing results in a fraction of the time required for the 1880 count. [3] For this work he received recognition including the Elliott Cresson Medal from the Franklin Institute.
Business and IBM
In 1896 Hollerith founded the Tabulating Machine Company to market his equipment to governments and businesses for census, accounting, and record-keeping tasks. [1] In 1911 the firm merged with several others to form the Computing-Tabulating-Recording Company (CTR), which was renamed International Business Machines (IBM) in 1924. [4] Hollerith's punched-card technology remained central to IBM's business for decades.
Legacy
Hollerith died on November 17, 1929, in Washington, D.C. He is widely regarded as a founding figure in the history of automatic data processing, and the punched card remained a dominant medium for computing input well into the twentieth century. [5] He was inducted into the National Inventors Hall of Fame in recognition of his contributions.
