David Walden
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David Corydon Walden (June 7, 1942April 27, 2022) was an American computer scientist and Internet pioneer who contributed to the engineering development of the
ARPANET The Advanced Research Projects Agency Network (ARPANET) was the first wide-area packet-switched network with distributed control and one of the first computer networks to implement the TCP/IP protocol suite. Both technologies became the tec ...
, a precursor of the modern
Internet The Internet (or internet) is the Global network, global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices. It is a internetworking, network of networks ...
. He specifically contributed to the
Interface Message Processor The Interface Message Processor (IMP) was the packet switching node used to interconnect participant networks to the ARPANET from the late 1960s to 1989. It was the first generation of gateways, which are known today as routers. An IMP was a r ...
, which was the
packet switching In telecommunications, packet switching is a method of grouping Data (computing), data into short messages in fixed format, i.e. ''network packet, packets,'' that are transmitted over a digital Telecommunications network, network. Packets consi ...
node In general, a node is a localized swelling (a "knot") or a point of intersection (a vertex). Node may refer to: In mathematics * Vertex (graph theory), a vertex in a mathematical graph *Vertex (geometry), a point where two or more curves, lines ...
for the ARPANET. Walden was a contributor to
IEEE Computer Society IEEE Computer Society (commonly known as the Computer Society or CS) is a technical society of the Institute of Electrical and Electronics Engineers (IEEE) dedicated to computing, namely the major areas of hardware, software, standards and people ...
's ''Annals of the History of Computing'' and was a member of the
TeX Users Group Tex, TeX, TEX, may refer to: People and fictional characters * Tex (nickname), a list of people and fictional characters with the nickname * Tex Earnhardt (1930–2020), U.S. businessman * Joe Tex (1933–1982), stage name of American soul singer ...
.


Early life and education

Walden was born on June 7, 1942, to Velva (née Diede) and Clarence Walden in
Longview, Washington Longview is a city in Cowlitz County, Washington, Cowlitz County, Washington (state), Washington, United States. It is the principal city of the Longview, Washington Metropolitan Statistical Area, which encompasses all of Cowlitz County. Longvie ...
. His mother was an elementary school teacher while his father was a high school teacher. His family moved to the
San Francisco Bay Area The San Francisco Bay Area, commonly known as the Bay Area, is a List of regions of California, region of California surrounding and including San Francisco Bay, and anchored by the cities of Oakland, San Francisco, and San Jose, California, S ...
when he was aged four. He started out at
University of California, Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California), is a Public university, public Land-grant university, land-grant research university in Berkeley, California, United States. Founded in 1868 and named after t ...
, before dropping out with poor grades and subsequently moving to
San Francisco State University San Francisco State University (San Francisco State, SF State and SFSU) is a Public university, public research university in San Francisco, California, United States. It was established in 1899 as the San Francisco State Normal School and is ...
, where he obtained a degree in Mathematics. While at San Francisco State University, he took a course in
numerical analysis Numerical analysis is the study of algorithms that use numerical approximation (as opposed to symbolic computation, symbolic manipulations) for the problems of mathematical analysis (as distinguished from discrete mathematics). It is the study of ...
, a field of mathematics, that triggered his interest in computers, and he worked on an
IBM 1620 The IBM 1620 was a model of scientific minicomputer produced by IBM. It was announced on October 21, 1959, and was then marketed as an inexpensive scientific computer. After a total production of about two thousand machines, it was withdrawn on N ...
computer A computer is a machine that can be Computer programming, programmed to automatically Execution (computing), carry out sequences of arithmetic or logical operations (''computation''). Modern digital electronic computers can perform generic set ...
, the university's only computer.


Career

Walden started his career working as a
programmer A programmer, computer programmer or coder is an author of computer source code someone with skill in computer programming. The professional titles Software development, ''software developer'' and Software engineering, ''software engineer' ...
at the space communications division of
Massachusetts Institute of Technology The Massachusetts Institute of Technology (MIT) is a Private university, private research university in Cambridge, Massachusetts, United States. Established in 1861, MIT has played a significant role in the development of many areas of moder ...
's
Lincoln Laboratory The MIT Lincoln Laboratory, located in Lexington, Massachusetts, is a United States Department of Defense federally funded research and development center chartered to apply advanced technology to problems of national security. Research and dev ...
. He moved to join Bolt Beranek & Newman (BBN) in 1967. It was here that he was part of the seven-member engineering team that developed the
packet switching In telecommunications, packet switching is a method of grouping Data (computing), data into short messages in fixed format, i.e. ''network packet, packets,'' that are transmitted over a digital Telecommunications network, network. Packets consi ...
technology that powered the
ARPANET The Advanced Research Projects Agency Network (ARPANET) was the first wide-area packet-switched network with distributed control and one of the first computer networks to implement the TCP/IP protocol suite. Both technologies became the tec ...
, one of the first general purpose
computer networks A computer network is a collection of communicating computers and other devices, such as printers and smart phones. In order to communicate, the computers and devices must be connected by wired media like copper cables, optical fibers, or ...
that was a precursor of the modern internet. During his time at BBN, the group of engineers developed the
Interface Message Processor The Interface Message Processor (IMP) was the packet switching node used to interconnect participant networks to the ARPANET from the late 1960s to 1989. It was the first generation of gateways, which are known today as routers. An IMP was a r ...
, that formed the packet switching basis for the network, developed the hardware, wrote the software, and even acted as the
Network Operations Center A network operations center (NOC, pronounced like the word ''knock''), also known as a "network management center", is one or more locations from which network monitoring and control, or network management, is exercised over a computer, teleco ...
for the network. Specifically, Walden's efforts focused on developing the packet switching and routing software for the IMP. He developed what became known as the "Walden message switching protocol", and was acknowledged by
Vint Cerf Vinton Gray Cerf (; born June 23, 1943) is an American Internet pioneer and is recognized as one of "the fathers of the Internet", sharing this title with TCP/IP co-developer Robert Kahn. He has received honorary degrees and awards that inclu ...
and
Bob Kahn Robert Elliot Kahn (born December 23, 1938) is an American electrical engineer who, along with Vint Cerf, first proposed the Transmission Control Protocol (TCP) and the Internet Protocol (IP), the fundamental communication protocols at the hea ...
in their seminal 1974 paper on internetworking, ''A Protocol For Packet Network Intercommunication.'' Walden briefly moved to Norway to work at Norsk Data Elektronikk in
Oslo Oslo ( or ; ) is the capital and most populous city of Norway. It constitutes both a county and a municipality. The municipality of Oslo had a population of in 2022, while the city's greater urban area had a population of 1,064,235 in 2022 ...
, developing the LFK network, a Norwegian packet switching network, between 1970 and 1971, before returning to the United States to continue working with BBN. Walden was the system architect and Norsk Data's project manager in building out this network. Toward the latter part of his career, Walden focused on management research and wrote extensively on the topic. He was also a member of the
TeX Users Group Tex, TeX, TEX, may refer to: People and fictional characters * Tex (nickname), a list of people and fictional characters with the nickname * Tex Earnhardt (1930–2020), U.S. businessman * Joe Tex (1933–1982), stage name of American soul singer ...
and contributed to content related to digital typesetting and publishing. He had also served as the group's director and treasurer. Walden received a honorary doctorate from the San Francisco State University in 2014, for his contributions to the ARPANET. Walden was the co-founder of Center for Quality of Management and a contributor to
IEEE Computer Society IEEE Computer Society (commonly known as the Computer Society or CS) is a technical society of the Institute of Electrical and Electronics Engineers (IEEE) dedicated to computing, namely the major areas of hardware, software, standards and people ...
's Annals of the History of Computing and a member of its History Committee.


Personal life

Walden married Sara Elizabeth Cowles, an educational administrator, in 1966. The couple had a son. Walden died of
mantle cell lymphoma Mantle cell lymphoma (MCL) is a type of Non-Hodgkin lymphoma, non-Hodgkin's lymphoma, comprising about 6% of cases. It is named for the mantle zone of the lymph nodes where it develops. The term 'mantle cell lymphoma' was first adopted by Raffe ...
at his house in East Sandwich, Massachusetts, on April 27, 2022. He was aged 79.


Select publications

* * * * *


See also

*
List of Internet pioneers Instead of having a single inventor, the Internet was developed by many people over many years. The following people are Internet pioneers who have been recognized for their contribution to its early and ongoing development. These contributions ...


References


External links

*
David Walden Family
ollection of Resources

- biography done by his longtime co-worker, Alexander A. McKenzie, for the
IEEE Annals of the History of Computing The ''IEEE Annals of the History of Computing'' is a quarterly peer-reviewed academic journal published by the IEEE Computer Society. It covers the history of computing, computer science, and computer hardware. It was founded in 1979 by the Ame ...
{{DEFAULTSORT:Walden, David 1942 births 2022 deaths American computer scientists Deaths from cancer in Massachusetts Deaths from lymphoma in the United States People from Longview, Washington San Francisco State University alumni Scientists from Washington (state)