Leonard Kleinrock occupation computer scientist
Leonard Kleinrock (born June 13, 1934) is an American computer scientist and Internet pioneer. He is a long-tenured professor at UCLA's Henry Samueli School of Engineering and Applied Science.
In the early 1960s, Kleinrock pioneered the application of queueing theory to model delays in message switching networks in his Ph.D. thesis, published as a book in 1964. He later published several of the standard works on the subject. In the early 1970s, he applied queueing theory to model and measure the performance of packet switching networks. This work played an influential role in the development of the ARPANET. He supervised many graduate students whose later work on the communication protocols for internetworking led to the Internet protocol suite. His theoretical work on hierarchical routing in the late 1970s with student Farouk Kamoun remains critical to the operation of the Internet today.Education and career
Leonard Kleinrock was born  in New York City on June 13, 1934, to a Jewish family, and  graduated from the noted Bronx High School of Science in 1951. He received a Bachelor of Electrical Engineering degree in 1957 from the City College of New York, and a master's degree and a doctorate (Ph.D.) in electrical engineering and computer science from the Massachusetts Institute of Technology in 1959 and 1963 respectively. He then joined the faculty at the University of California at Los Angeles (UCLA), where he remains to the present day; during 1991–1995 he served as the chairman of the Computer Science Department there.
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