Bruce Gilchrist

Bruce Gilchrist
Born	(1930-08-04) 4 August 1930 Pontefract, Yorkshire, England
Died	23 May 2015(2015-05-23) (aged 84)
Occupation(s)	Computer scientist, professor
Years active	1952–1991
Known for	Early computing pioneer; contributions to computer hardware and programming; leadership in ACM and AFIPS; director of Columbia University Computer Center
Notable work	Co-development of rapid adder for Philco TRANSAC S-2000; doctoral dissertation on meteorology; various publications on computing

Bruce Gilchrist (4 August 1930 – 23 May 2015) is acknowledged as an influential pioneer in the evolution of contemporary computing. His documents and archival materials are maintained by the Charles Babbage Institute, which curates collections from leading innovators and institutions in computer science.

Early life and education

Gilchrist was born in Pontefract, Yorkshire, England, and attended King Edward VII School located in Kings Lynn. From a young age, he showed a keen fascination with computational machinery.

In October 1948, having been awarded a State Scholarship, he commenced an accelerated program in applied mathematics at the Imperial College of Science and Technology at the University of London.

During 1951, he participated in an intensive two-week course at Cambridge University conducted by Dr. Maurice Wilkes, the developer of the Electronic Delay Storage Automatic Calculator (EDSAC). Gilchrist later regarded this experience as his initial comprehensive introduction to computer programming and troubleshooting.

He married Jean DeWolf Littlefield in Princeton, New Jersey, in 1954. Together they had three sons: Ian, James, and Andrew.

Institute for Advanced Study

In 1952, Gilchrist obtained a doctorate in Meteorology from the University of London. That same year, supported by funding arranged through mathematician John von Neumann, he joined the Institute for Advanced Study in Princeton, New Jersey under the auspices of the Smith-Mundt and Fulbright initiatives. There, he collaborated with meteorologist Dr. Jule Charney on computational weather forecasting and programmed the institute’s IAS machine.

At IAS, Gilchrist also contributed to advancements in computer hardware. Working alongside engineer James H. Pomerene, he enhanced cathode ray tube memory technology (known as the Williams tube) by creating diagnostic software aimed at boosting speed and dependability. Together with Pomerene and Y.K. Wong, he co-developed a rapid adder utilizing an acceleration technique for asynchronous adders that minimized carry propagation delay. This innovation was integrated into the Philco TRANSAC S-2000, launched in 1957 as the first commercially available transistor-based computer.

Gilchrist’s marriage took place in Princeton in April 1954; his first son Ian was born there two years later. Following von Neumann’s departure from IAS in 1955, Gilchrist’s research group dissolved in 1956.

Later career

In 1956, Gilchrist assumed the role of assistant professor of mathematics and became the inaugural director of the computer center at Syracuse University, where he supervised the installation of an IBM 650 shortly after joining.

He became a member of the national Council of the Association for Computing Machinery (ACM) in 1958, broadening his professional connections within the American computing community.

In 1959, Dr. Herman H. Goldstine invited him to lead IBM Research’s computing facility. That year marked Gilchrist’s entry into IBM, where he later held positions including director of planning at IBM’s Service Bureau Corporation subsidiary from 1963 to 1965 and manager within IBM's Data Processing Division between 1965 and 1968.

Within ACM leadership, he served as secretary from 1960 to 1962 and vice president from 1962 to 1964. In 1966, he was elected president of the American Federation of Information Processing Societies (AFIPS), subsequently acting as its executive director from 1968 until 1973.

From 1973 through 1985, Gilchrist directed Columbia University’s Computer Center and remained a faculty member in Columbia’s engineering school until his retirement in 1991.

After settling in Chappaqua, New York in 1959, Gilchrist took on various community leadership roles including membership on the Chappaqua School Board and serving as supervisor for New Castle, New York between 1986 and 1989. Following his first wife Jean’s passing in 1989, he remarried and relocated to Richmond, Virginia with his wife Bette in 2008. He died on 23 May 2015 and is survived by his three sons: Ian, James, and Andrew.

Gilchrist fathered five grandchildren with Littlefield: Ian (married to Kelly Murphy), Juliann, Anthony (an archaeologist), Carson, and Griffin.

Doctoral Dissertation

• Gilchrist, Bruce, "Utilizing the Equations of Motion to Address Climatological Challenges," Ph.D. Dissertation, University of London, June 1952

Articles

• Gilchrist, B.; Pomerene, J.; Wong, S.Y., "Rapid carry logic for digital computing machines," IRE Transactions on Electronic Computers, EC-4 (December 1955), pp. 133–136.
• Esterin, B.; Gilchrist, B.; Pomerene, J. H., "Brief Communication on High-Speed Digital Multiplication," IRE Transactions on Electronic Computers, vol. EC-5, p. 140 (1956).
• Gilchrist, Bruce; Weber, Richard E., "A Quantitative Analysis of Trained Computer Staff Employment," AFIPS Joint Computer Conferences Proceedings, May 1972, pp. 641–648.
• Gilchrist, Bruce; Leininger, Joseph E., (editors), AFIPS/Stanford Conference Proceedings on Computers, Society, and Law—The Role of Legal Education, June 1973.
• Gilchrist, Bruce; Shenkin, Arlaana, "Effects of Scanner Technology on Supermarket Employment," Communications of the ACM, Vol. 25, Issue 7 (July 1982), pp. 441–445.
• Gilchrist, Bruce, "Ethics in Computer Science Education," ACM SIGUCCS Newsletter, Vol. 13, Issue 2 (Summer 1983), pp. 14–17.
• Gilchrist, Bruce, "Reflections on Early Computing Machines from 1948 to 1960," Columbia University EPIC, 2006. Contains autobiographical perspectives on initial computing experiences.
• Gilchrist, Bruce, "Tribute to James Pomerene (1920–2008)," New Castle Now, February 2009.

Books

• Gilchrist, Bruce; Wessel, Milton R., Regulatory Policies Affecting the Computer Industry, AFIPS Press, 1972.
• Gilchrist, Bruce, Genealogy of CHARLES GILCHRIST and CATHERINE ROBINSON, Gateway Press Inc., 2004.

References

• Charles Babbage Institute, "Bruce Gilchrist: Archival Documents and Biography."
• Gilchrist, Bruce, "Reflections on Early Computing Machines from 1948 to 1960," Columbia University EPIC, 2006.

External links

• Channer, Harold
• "Columbia Computer Center Personnel in 1985" – photograph including Bruce Gilchrist.