Donald Davies

Donald Watts Davies CBE FRS (June 7, 1924 – May 28, 2000) was a British computer scientist who was a co-inventor of packet switching (and originator of the term), along with Paul Baran and Leonard Kleinrock in the US. File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... June 7 is the 158th day of the year in the Gregorian calendar (159th in leap years), with 207 days remaining. ... 1924 was a leap year starting on Tuesday (link will take you to calendar). ... May 28 is the 148th day of the year in the Gregorian calendar (149th in leap years). ... This article is about the year 2000. ... Computer science (informally: CS or compsci) is, in its most general sense, the study of computation and information processing, both in hardware and in software. ... In computer networking and telecommunications, packet switching is a communications paradigm in which packets (messages or fragments of messages) are individually routed between nodes, with no previously established communication path. ... Paul Baran (born 1926) was one of the developers of packet switched networks with Donald Davies. ... Leonard Kleinrock and the first IMP. source: (http://www. ... ...

Just prior to Davies' death, he contested Kleinrock's views on the importance of Kleinrock's contributions. Kleinrock and Davies were certainly on the same track and there is a correspondence from Kleinrock to Davies conceeding that "Packet Switching" was a suitable term for the concept. Some people say he killed Tupac!!!!Italic text Davies was born in Treorchy in the Rhondda Valley, Wales. He received BSc degrees in physics (1943) and mathematics (1947) at Imperial College in London. In 1955, he married Diane Burton. In computer networking and telecommunications, packet switching is a communications paradigm in which packets (messages or fragments of messages) are individually routed between nodes, with no previously established communication path. ... Treorchy (Welsh: Treorci) is a village, although it used to be and still has characteristics of a town, in the county borough of Rhondda Cynon Taff, traditional county of Glamorgan, south Wales, lying in the Rhondda Fawr Valley. ... Rhondda Cynon Taff (Welsh: Rhondda Cynon Tâf) is a county borough in Glamorgan, South Wales. ... National motto: Cymru am byth (Welsh: Wales for ever) Waless location within the UK Official languages English, Welsh Capital Cardiff Largest city Cardiff First Minister Rhodri Morgan Area  - Total Ranked 3rd UK 20,779 km² Population  - Total (2001)  - Density Ranked 3rd UK 2,903,085 140/km² Ethnicity: 97. ... BSC is an abbreviation for: Bachelor of Science - ususally written BSc (academic degree) Barcelona Supercomputing Center Base Station Controller (part of a GSM mobile phone network) BSC-protocol - standard for computer communication developed by IBM The British Society of Cinematographers Birmingham-Southern College - Birmingham-Southern College basic - represents theoretical exact... Since antiquity, people have tried to understand the behavior of matter: why unsupported objects drop to the ground, why different materials have different properties, and so forth. ... 1943 is a common year starting on Friday. ... Wikibooks Wikiversity has more about this subject: School of Mathematics Wikiquote has a collection of quotations related to: Mathematics Look up Mathematics on Wiktionary, the free dictionary Wikimedia Commons has media related to: Mathematics Bogomolny, Alexander: Interactive Mathematics Miscellany and Puzzles. ... 1947 was a common year starting on Wednesday (link will take you to calendar). ... Royal School of Mines Entrance Imperial College London is a college of the University of London which focuses on science and technology, and is located in South Kensington in London. ... London is the capital city of the United Kingdom and of England. ... 1955 (MCMLV) was a common year starting on Saturday of the Gregorian calendar. ...

He worked at the National Physical Laboratory at Teddington just outside London. From 1947, he worked with Alan Turing on the Pilot ACE computer and indeed spotted mistakes in Turing's seminal 1936 paper On Computable Numbers, much to Turing's annoyance. These were perhaps some of the first "programming" errors in existence, even if they were for a theoretical computer, the universal Turing machine. He headed the NPL Autonomic Division from 1966 and worked on computer network security from the late 1970s. The National Physical Laboratory (NPL) is the national measurement standards laboratory for the United Kingdom, based at Bushy Park in Teddington, near London. ... For the village in Gloucestershire, see Teddington,_Gloucestershire Teddington is a place in London, England in the London Borough of Richmond upon Thames. ... London is the capital city of the United Kingdom and of England. ... 1947 was a common year starting on Wednesday (link will take you to calendar). ... Alan Turing is often considered the father of modern computer science. ... The Pilot ACE was one of the first computers built in the United Kingdom, at the National Physical Laboratory (NPL) in the late 1940s. ... 1936 was a leap year starting on Wednesday (link will take you to calendar). ... The Turing machine is an abstract machine introduced in 1936 by Alan Turing to give a mathematically precise definition of algorithm or mechanical procedure. As such it is still widely used in theoretical computer science, especially in complexity theory and the theory of computation. ... 1966 was a common year starting on Saturday (link goes to calendar) // Events January January 1 - In a coup, Colonel Jean-Bédel Bokassa ousts president David Dacko and takes over the Central African Republic. ... Computer security is a field of computer science concerned with the control of risks related to computer use. ... The 1970s in its most obvious sense refers to the decade between 1970 and 1979. ...

Davies was appointed a CBE in 1983 and a Fellow of the Royal Society in 1987. Commanders Badge of the Order of the British Empire The Most Excellent Order of the British Empire is an order of chivalry established on 4 June 1917 by George V. The Order includes five classes in civil and military divisions, in decreasing order of seniority: Knight or Dame Grand... 1983 (MCMLXXXIII) is a common year starting on Saturday of the Gregorian calendar. ... The Royal Society of London for the Improvement of Natural Knowledge, known simply as the Royal Society, is claimed to be the oldest learned society still in existence. ... 1987 (MCMLXXXVII) is a common year starting on Thursday of the Gregorian calendar. ...

Books

• With D. Barber: Communication Networks for Computers, Wiley, 1973.
• With W. Price: Security for Computer Networks, Wiley, 1984.

John Wiley & Sons, Inc. ... 1973 was a common year starting on Monday. ... John Wiley & Sons, Inc. ... This page is about the year 1984. ...

See also

• ARPANET, forerunner of the Internet

ARPANET logical map, March 1977. ...

External links

• Biography from the History of Computing Project
• Famous names at NPL
• Guardian obtuary
• Internet Society obituary
• UK National Physical Laboratory (NPL) & Donald Davies from Living Internet
• Donald Davies (1924–2000)