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Leonard Kleinrock
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Leonard Kleinrock

American computer scientist
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Written by
Erik Gregersen
Erik Gregersen is a senior editor at Encyclopaedia Britannica, specializing in the physical sciences and technology. Before joining Britannica in 2007, he worked at the University of Chicago Press on the...
Erik Gregersen
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Article History
Quick Facts
Born:
June 13, 1934, New York City (age 90)
Awards And Honors:
National Medal of Science (2007)
Draper Prize (2001)

Leonard Kleinrock (born June 13, 1934, New York City) is an American computer scientist who developed the mathematical theory behind packet switching and who sent the first message between two computers on a network that was a precursor of the Internet. Kleinrock received a bachelor’s degree in electrical engineering from the City College of New York in 1957. He earned a master’s degree (1959) and a doctorate (1963) in electrical engineering from the Massachusetts Institute of Technology (MIT) in Cambridge. MIT had many computers, and Kleinrock realized that they would eventually have to interact with each other in a network. ...(100 of 590 words)

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