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From Analytical Engine to Electronic Digital Computer: The Contributions of Ludgate, Torres, and Bush
October-December 1982 (vol. 4 no. 4)
pp. 327-341

This paper, based on an invited lecture given at MIT in March 1980, discusses the little-known work of Percy E. Ludgate (1883- 1922), Leonardo Torres y Quevedo (1852- 1936), and Vannevar Bush (1890- 1974). These three inventors, who apparently were unaware of one another's existence, were all directly influenced by know/edge of Charles Babbage's Analytical Engine, and each played a significant role in the history of the development of program-controlled computers.

Citation:
Brian Randell, "From Analytical Engine to Electronic Digital Computer: The Contributions of Ludgate, Torres, and Bush," IEEE Annals of the History of Computing, vol. 4, no. 4, pp. 327-341, Oct.-Dec. 1982, doi:10.1109/MAHC.1982.10042
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