David John Wheeler (9 February 1927–13 December 2004) was a computer scientist. His contributions to the field included work on the EDSAC and the Burrows-Wheeler transform. Along with Maurice Wilkes and Stanley Gill he is credited with the invention of the subroutine (which they referred to as the closed subroutine). In cryptography, he was the designer of WAKE and the co-designer of the TEA and XTEA encryption algorithms together with Roger Needham. February 9 is the 40th day of the year in the Gregorian Calendar. ... Events January 7 - First transatlantic telephone call - New York City to London January 9 - Military rebellion crushed in Lisbon January 14 - Paul Doumer elected president of France January 19 - Britain sends troops to China February 12 - First British troops lad on Shanghai February 14 - Earthquake in Yugoslavia - 700 dead February... December 13 is the 347th day of the year (348th in leap years) in the Gregorian calendar. ... 2004 is a leap year starting on Thursday of the Gregorian calendar. ... 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. ... The EDSAC (Electronic Delay Storage Automatic Computer) ran its first program May 6, 1949, and was constructed by Maurice Wilkes and his team at the University of Cambridge Mathematical Laboratory, England, inspired by the EDVAC design report by John von Neumann. ... The Burrows-Wheeler transform (BWT, also called block-sorting compression), is an algorithm used in data compression techniques such as bzip2. ... Maurice V. Wilkes Maurice Vincent Wilkes (born June 26, 1913 in Dudley, Staffordshire, England) is a British computer scientist, credited with several important developments in computing. ... In computer science, a subroutine (function, procedure, or subprogram) is a sequence of code which performs a specific task, as part of a larger program, and is grouped as one, or more, statement blocks; such code is sometimes collected into software libraries. ... Cryptography portal Cryptography (from Greek kryptós, hidden, and gráphein, to write) is, traditionally, the study of means of converting information from its normal, comprehensible form into an incomprehensible format, rendering it unreadable without secret knowledge — the art of encryption. ... A wake is the region of turbulence immediately to the rear of a solid body caused by the flow of air or water around the body. ... This article is about the TEA encryption algorithm. ... In cryptography, XTEA (eXtended TEA) is a block cipher designed to correct weaknesses in TEA. The ciphers designers were David Wheeler and Roger Needham of the Cambridge Computer Laboratory, and the algorithm was presented in an unpublished technical report in 1997 (Needham and Wheeler, 1997). ... Roger Needham in 1999 Roger Michael Needham (February 9, 1935 - February 28, 2003) was a British computer scientist. ...

External links

• Computer History Museum (http://www.computerhistory.org/events/hall_of_fellows/david_wheeler/index.shtml) biography
• Obituaries
  • University of Cambridge (http://www.cl.cam.ac.uk/UoCCL/misc/obit/wheeler.html)
  • Cambridge News (http://w3.cambridge-news.co.uk/business/story.asp?StoryID=66713)
  • Independent (http://news.independent.co.uk/low_res/story.jsp?story=595316&host=3&dir=271)
  • The Times (http://www.timesonline.co.uk/article/0,,60-1414424,00.html)