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Leonard Kleinrock and the first Interface Message Processor. source: (http://www.lk.cs.ucla.edu/personal_history.html)
Leonard Kleinrock and the first Interface Message Processor. The Interface Message Processor (IMP was the Packet-switching node used to connect computers to the original ARPANET in the late 1960s and 1970s source: (http://www.lk.cs.ucla.edu/personal_history.html)

Leonard Kleinrock, Ph. D. (born June 13, 1934 in New York) is a computer scientist, and a professor of computer science at UCLA, who made several important contributions to the field of computer networking, in particular to the theoretical side of computer networking. Events 1525 - Martin Luther marries Katharina von Bora, against the Celibacy rule decreed by the Roman Catholic Church for Year 1934 ( MCMXXXIV) was a Common year starting on Monday (link will display full 1934 calendar of the Gregorian calendar. New York ( is a state in the Mid-Atlantic and Northeastern regions of the United States and is the nation's third most populous A computer scientist is a person that has acquired knowledge of Computer science, the study of the theoretical foundations of information and computation and their application The University of California Los Angeles (generally known as UCLA) is a public research university located in Westwood Los Angeles, California, United A computer network is a group of interconnected Computers. Networks may be classified according to a wide variety of characteristics He also played an important role in the development of the ARPANET at UCLA. The ARPANET ( Advanced Research Projects Agency Network) developed by ARPA of the United States Department of Defense, was the world's first operational

His most well-known and significant work is his early work on queueing theory, which has applications in many fields, among them as a key mathematical background to packet switching, the basic technology behind the Internet. Queueing theory is the mathematical study of waiting lines (or queues ' Packet switching is a network communications method that splits data traffic (digital representations of text sound or video data into chunks called packets, that are then The Internet is a global system of interconnected Computer networks His initial contribution to this field was his doctoral thesis in 1962, published in book form in 1964; he later published several of the standard works on the subject. Year 1962 ( MCMLXII) was a Common year starting on Monday (the link is to a full 1962 calendar of the Gregorian calendar. Year 1964 ( MCMLXIV) was a Leap year starting on Wednesday (link will display full calendar of the 1964 Gregorian calendar.

He has described this work as:

"Basically, what I did for my PhD research in 1961–1962 was to establish a mathematical theory of packet networks . . . "

His theoretical work on hierarchical routing, done in the late 1970s with his then-student Farouk Kamoun, is now critical to the operation of today's world-wide Internet. Hierarchical routing: Routing that is based on hierarchical addressing This article is about the Decade 1970-1979 For the Year 1970 see 1970. Farouk Kamoun, PhD (born 1946 is a Tunisian computer scientist and professor of computer science at ENSI ( Ecole Nationale Sciences Informatiques

Contents

ARPANET and the Internet

In 1969, ARPANET, the world's first packet switched computer network, was established on October 29 between nodes at Kleinrock's lab at UCLA and Douglas Engelbart's lab at SRI. Year 1969 ( MCMLXIX) was a Common year starting on Wednesday (link will display full calendar of the Gregorian calendar. The ARPANET ( Advanced Research Projects Agency Network) developed by ARPA of the United States Department of Defense, was the world's first operational Events 437 - Valentinian III, Western Roman Emperor, marries Licinia Eudoxia, daughter of his cousin Theodosius II The University of California Los Angeles (generally known as UCLA) is a public research university located in Westwood Los Angeles, California, United Dr Douglas C Engelbart (born January 30 1925 is an American Inventor. SRI International, based in the United States is one of the world's largest contract Research institutes. Interface Message Processors (IMP) at both sites served as the backbone of the first Internet [1]. The Interface Message Processor (IMP was the Packet-switching node used to connect computers to the original ARPANET in the late 1960s and 1970s The Internet backbone refers to the main "trunk" connections of the Internet. The Internet is a global system of interconnected Computer networks

In addition to SRI and UCLA, UCSB, and the University of Utah were part of the original four network nodes. The University of California Santa Barbara ( UCSB) is a selective research-oriented public university located on the Pacific Ocean in Santa Barbara County California The University of Utah (referred to locally as ' The U' or ' the U of U') is a publicly funded Research university in Salt Lake By December 5, 1969, the initial 4-node network was connected. Events 63 BC - Cicero reads the last of his Catiline Orations. Year 1969 ( MCMLXIX) was a Common year starting on Wednesday (link will display full calendar of the Gregorian calendar.

In 1988, Kleinrock chaired a group which presented the report Toward a National Research Network to congress [2]. This report was highly influential upon then-Senator Al Gore who used it to develop the Gore Bill or the High Performance Computing Act of 1991 [3], which was influential in the development of the Internet as it is known today. Albert Arnold Gore Jr (born March 31 1948 is an American environmental Activist, author Businessperson, former Politician, and former The Internet is a global system of interconnected Computer networks [4]. In particular, it led indirectly to the development of the 1993 web browser MOSAIC, which was created at National Center for Supercomputing Applications(NSCA) which was funded by the High-Performance Computing and Communications Initiative, a program created by the High Performance Computing Act of 1991. Mosaic is the browser which popularized the World Wide Web. It was also a browser for earlier concepts such as Ftp, Usenet, and Gopher The National Center for Supercomputing Applications ( NCSA) is one of five original centers in the National Science Foundation 's Supercomputer Centers Program and a

Education and career

He graduated from the legendary Bronx High School of Science in 1951, and received a B. The Bronx High School of Science (commonly called Bronx Science, Bronx Sci, or just Science, and officially known as H Year 1951 ( MCMLI) was a Common year starting on Monday. Events of 1951 January E. E. in 1957 from the City College of New York, and an S.M. and a Ph. Year 1957 ( MCMLVII) was a Common year starting on Tuesday (link displays the 1957 Gregorian calendar) The City College of The City University of New York (known more commonly as the City College of New York or simply City College, CCNY, or colloquially as D. in EECS from MIT in 1959 and 1963 respectively. EECS (sometimes ˈiːks "eeks" is an abbreviation for Electrical Engineering and Computer Sciences. He then joined the faculty at UCLA, where he remains to the present day; during 1991-1995 he served as the Chairman of the Computer Science Department there. The University of California Los Angeles (generally known as UCLA) is a public research university located in Westwood Los Angeles, California, United

Kleinrock is also a member of the advisory board of TTI/Vanguard. TTI/Vanguard is a Santa Monica-based company that puts on five conferences a year for senior business executives exploring upcoming trends in technology with a 2-5 year horizon

He has received numerous professional awards.

See also

Further reading

External links

The Association for Computing Machinery, or ACM, was founded in 1947 as the world's first scientific and educational Computing society
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