Leonard Kleinrock
Leonard Kleinrock

Celebrity Profile

Name: Leonard Kleinrock
Occupation: Engineer
Gender: Male
Birth Day: June 13, 1934
Age: 86
Country: United States
Zodiac Sign: Gemini

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Weight: in kg - N/A
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Leonard Kleinrock

Leonard Kleinrock was born on June 13, 1934 in United States (86 years old). Leonard Kleinrock is an Engineer, zodiac sign: Gemini. Find out Leonard Kleinrocknet worth 2020, salary 2020 detail bellow.

Brief Info

Notable for his development of key elements of computer networking theory, this longtime University of California, Los Angeles professor is particularly famous for his work on queueing theory. He was a 2007 recipient of the National Medal of Science and a 2012 winner of the IEEE Alexander Graham Bell Medal.


His 1970s hierarchical routing research was very important in the development of the modern internet.

Net Worth

Net Worth 2020


Salary 2020

Not known

Before Fame

After earning a bachelor's degree from the City College of New York, he continued his study of computer science and electrical engineering at the Massachusetts Institute of Technology, graduating with a PhD in the early 1960s.

Biography Timeline


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.


His initial contribution to this field was his doctoral thesis at the Massachusetts Institute of Technology in 1962, published in book form in 1964; he later published several of the standard works on the subject.


The first message on the ARPANET was sent by a UCLA student programmer, Charley Kline, supervised by Kleinrock. At 10:30 p.m, on October 29, 1969 from Boelter Hall 3420, the school's main engineering building, Kline transmitted from the university's SDS Sigma 7 host computer to the Stanford Research Institute's SDS 940 host computer. The message text was the word "login"; the "l" and the "o" letters were transmitted, but the system then crashed. Hence, the literal first message over the ARPANET was "lo". About an hour later, having recovered from the crash, the SDS Sigma 7 computer effected a full "login". The first permanent ARPANET link was established on November 21, 1969, between the IMP at UCLA and the IMP at the Stanford Research Institute. By December 5, 1969, the initial four-node network was established.


Kleinrock claims to have committed the first illegal act on the Internet, having sent a request for return of his electric razor after a meeting in England in 1973. At the time, use of the ARPANET for personal reasons was unlawful.


In 1988, Kleinrock was the chairman of a group that presented the report Toward a National Research Network to the U.S. Congress, concluding that "There is a clear and urgent need for a national research network". Although the U.S. did not build a nation-wide national research and education network, this report informed the development of the High Performance Computing Act of 1991, which was influential in the development of the Internet as it is known today. Funding from the bill was used in the development of the 1993 web browser Mosaic, at the National Center for Supercomputing Applications (NCSA).


He has received numerous professional awards. In 2001 he received the Draper Prize "for the development of the Internet". Kleinrock was selected to receive the prestigious National Medal of Science, the nation's highest scientific honor, from President George W. Bush in the White House on September 29, 2008. "The 2007 National Medal of Science to Leonard Kleinrock for his fundamental contributions to the mathematical theory of modern data networks, and for the functional specification of packet switching, which is the foundation of Internet technology. His mentoring of generations of students has led to the commercialization of technologies that have transformed the world."


In 2010 he shared the Dan David Prize. UCLA Room 3420 at Boelter Hall was restored to its condition of 1969 and converted into the Kleinrock Internet Heritage Site and Archive. It opened to the public with a grand opening attended by Internet pioneers on October 29, 2011.


In 2012, Kleinrock was inducted into the Internet Hall of Fame by the Internet Society. Leonard Kleinrock was inducted into IEEE-Eta Kappa Nu (IEEE-ΗΚΝ) in 2011 as an Eminent Member. The designation of Eminent Member is the organization's highest membership grade and is conferred upon those select few whose outstanding technical attainments and contributions through leadership in the fields of electrical and computer engineering have significantly benefited society. He was elected to the 2002 class of Fellows of the Institute for Operations Research and the Management Sciences. In September 2014, Leonard Kleinrock was awarded the ACM SIGMOBILE Outstanding Contribution Award at MobiCom 2014.

Family Life

Leonard grew up in a Jewish family in New York City and later relocated to Boston, Massachusetts and Los Angeles, California.

🎂 Upcoming Birthday

Currently, Leonard Kleinrock is 88 years, 0 months and 17 days old. Leonard Kleinrock will celebrate 89th birthday on a Tuesday 13th of June 2023. Below we countdown to Leonard Kleinrock upcoming birthday.


Recent Birthday Highlights

84th birthday - Wednesday, June 13, 2018

80th birthday - Friday, June 13, 2014

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