John Mauchly
John Mauchly | |
---|---|
Cincinnati, Ohio, US | |
Died | January 8, 1980 | (aged 72)
Alma mater | Johns Hopkins University |
Known for | ENIAC, UNIVAC, Mauchly's sphericity test |
Awards | Harry H. Goode Memorial Award (1966) Harold Pender Award (1973) IEEE Emanuel R. Piore Award (1978)[1] |
Scientific career | |
Fields | Physics |
Institutions | Ursinus College University of Pennsylvania |
John William Mauchly (August 30, 1907 – January 8, 1980) was an American
Together, Mauchly and Eckert started the first computer company, the
Biography
John W. Mauchly was born on August 30, 1907, to Sebastian and Rachel (Scheidemantel) Mauchly in Cincinnati, Ohio. He moved with his parents and sister, Helen Elizabeth (Betty), at an early age to Chevy Chase, Maryland, when Sebastian Mauchly obtained a position at the
From 1932 to 1933, Mauchly served as a research assistant at Johns Hopkins University where he concentrated on calculating energy levels of the formaldehyde spectrum. Mauchly's teaching career truly began in 1933 at Ursinus College where he was appointed head of the physics department, where he was, in fact, the only staff member.[2]
In the summer of 1941, Mauchly took a Defense Training Course for Electronics at the University of Pennsylvania Moore School of Electrical Engineering. There he met the lab instructor,
In 1959, Mauchly left Sperry Rand and started Mauchly Associates, Inc. One of Mauchly Associates' notable achievements was the development of the Critical Path Method (CPM) which provided for automated construction scheduling. Mauchly also set up a consulting organization, Dynatrend, in 1967 and worked as a consultant to Sperry UNIVAC from 1973 until his death in 1980.[2]
John Mauchly died on January 8, 1980, in Ambler, Pennsylvania,[3] during heart surgery and following a long illness. His first wife, Mary Augusta Walzl, a mathematician, whom he married on December 30, 1930, drowned in 1946. John and Mary Mauchly had two children, James (Jimmy) and Sidney. In 1948, Mauchly married Kathleen Kay McNulty (1921–2006), one of the six original ENIAC programmers; they had five children Sara (Sallie), Kathleen (Kathy), John, Virginia (Gini), and Eva.[2]
Moore School
In 1941 Mauchly took a course in wartime electronics at the Moore School of Electrical Engineering, part of the University of Pennsylvania. There he met J. Presper Eckert, a recent Moore School graduate. Mauchly accepted a teaching position at the Moore School, which was a center for wartime computing. Eckert encouraged Mauchly to believe that vacuum tubes could be made reliable with proper engineering practices. The critical problem that was consuming the Moore School was ballistics: the calculation of firing tables for the large number of new guns that the U.S. Army was developing for the war effort.
ENIAC
In 1942 Mauchly wrote a memo proposing the building of a general-purpose electronic computer.[4] The proposal, which circulated within the Moore School (but the significance of which was not immediately recognized), emphasized the enormous speed advantage that could be gained by using digital electronics with no moving parts. Lieutenant Herman Goldstine, who was the liaison between the United States Army and Moore School, picked up on the idea and asked Mauchly to write a formal proposal. In April 1943, the Army contracted with the Moore School to build the Electronic Numerical Integrator and Computer (ENIAC). Mauchly led the conceptual design while Eckert led the hardware engineering on ENIAC. A number of other talented engineers contributed to the confidential "Project PX".
Because of its high-speed calculations, ENIAC could solve problems that were previously unsolvable. It was roughly a thousand times faster than the existing technology. It could add 5,000 numbers or do 357 10-digit multiplications in one second.
ENIAC could be programmed to perform sequences and loops of addition, subtraction, multiplication, division, square-root,
In 2002, for his work on ENIAC he was inducted, posthumously, into the National Inventors Hall of Fame.[5]
EDVAC
The ENIAC design was frozen in 1944 to allow construction. Eckert and Mauchly were already aware of the limitations of the machine and began plans on a second computer, to be called EDVAC. By January 1945 they had procured a contract to build this stored-program computer. Eckert had proposed a mercury delay-line memory to store both program and data. Later that year, mathematician John von Neumann learned of the project and joined in some of the engineering discussions. He produced what was understood to be an internal document describing the EDVAC.
The term von Neumann architecture arose from von Neumann's paper First Draft of a Report on the EDVAC.[6] Dated June 30, 1945, it was an early written account of a general-purpose stored-program computing machine (the EDVAC). Goldstine, in a move that was to become controversial, removed any reference[citation needed] to Eckert or Mauchly and distributed the document to a number of von Neumann's associates across the country. The ideas became widely known within the very small world of computer designers.
Besides the lack of credit, Eckert and Mauchly suffered additional setbacks due to Goldstine's actions. The ENIAC patent U.S. patent 3,120,606, issued in 1964
The Moore School Lectures
In March 1946, just after the ENIAC was announced, the Moore School decided to change their patent policy, in order to gain commercial rights to any future and past computer development there. Eckert and Mauchly decided this was unacceptable; they resigned. However they had already been contracted to do one more thing at the Moore School: to give a series of talks on computer design.
The course "The Theory and Techniques for Design of Digital Computers", ran from July 8 to August 31, 1946. Eckert gave 11 of the lectures; Mauchly and Goldstine each delivered 6. "The Moore School Lectures", as they came to be known, were attended by representatives from the army, the navy, MIT, the National Bureau of Standards, Cambridge University, Columbia, Harvard, the Institute for Advanced Study, IBM, Bell Labs, Eastman Kodak, General Electric, and National Cash Register. A number of the attendees were to later go on to develop computers, such as Maurice Wilkes, of Cambridge, who built EDSAC.
Eckert–Mauchly Computer Corporation
In 1947 Eckert and Mauchly formed the first computer company, the
UNIVAC, the first computer designed for business applications, had many significant technical advantages such as magnetic tape for mass storage. As an interim product, the company created and delivered a smaller computer, BINAC, but were still in a shaky financial situation. They were purchased by Remington Rand
Software
Very early in the history of EMCC, John Mauchly assumed responsibility for programming, coding, and applications for the planned computer systems. His early interaction with representatives of the Census Bureau in 1944 and 1945, and discussion with people interested in statistics, weather prediction, and various business problems in 1945 and 1946 focused his attention on the need to provide new users with the software to accomplish their objectives. He knew it would be difficult to sell computers without application materials, and without training in how to use the systems. And so, EMCC began to assemble a staff of mathematicians interested in coding in early 1947. (from Norberg)
Mauchly's interest lay in the application of computers, as well as to their architecture and organization. His experience with programming the ENIAC and its successors led him to create
John Mauchly has also been credited for being the first one using the verb "to program" in his 1942 paper on electronic computing, although in the context of ENIAC, not in its current meaning.
Career
Mauchly stayed involved in computers for the rest of his life. He was a founding member and president of the Association for Computing Machinery (ACM) and also helped found the Society for Industrial and Applied Mathematics (SIAM), serving as its fourth president. The Eckert–Mauchly Corporation was bought by Remington Rand in 1950 and for ten years Mauchly remained as Director of Univac Applications Research. Leaving in 1959 he formed Mauchly Associates, a consulting company that later introduced the critical path method (CPM) for construction scheduling by computer. In 1967 he founded Dynatrend, a computer consulting organization. In 1973 he became a consultant to Sperry Univac.
Awards
Mauchly received numerous award and honors. He was a life member of the
Patent controversy
This section needs additional citations for verification. (December 2008) |
Mauchly and Eckert's patent on the ENIAC was
Critics note that while the court said that the ABC was the first electronic digital computer, it did not define the term
Critics of the court decision also note that there is, at a component level, nothing in common between the two machines. The ABC was binary; the ENIAC was decimal. The ABC used regenerative
Proponents for the court decision emphasize that the testimony established that Mauchly definitely visited Atanasoff's lab at Iowa State College, had complete access to Atanasoff's machine and the documents describing it. Letters he wrote to Atanasoff show that he was at one time at least considering building on Atanasoff's approach.
Mauchly consistently maintained that it was the use of high-speed electronic flip-flops in cosmic-ray counting devices at Swarthmore College that gave him the idea for computing at electronic speeds.
See also
References
- IEEE. Archived from the original(PDF) on November 24, 2010. Retrieved March 20, 2021.
- ^ a b c d e "John W. Mauchly Papers". Penn Libraries. University of Pennsylvania. Retrieved April 4, 2020.
- ^ The Use of High-Speed Vacuum Tube Devices for Calculating (by John W. Mauchly, August 1942)
- ^ National Inventors Hall of Fame Archived 2013-08-24 at the Wayback Machine
- ^ Michael D. Godfrey, "Introduction to 'The First Draft Report on the EDVAC' by John von Neumann". Archived February 22, 2012, at the Wayback Machine.
- ^ "Archived copy" (PDF). Archived from the original (PDF) on 2010-03-11. Retrieved 2008-12-19.
{{cite web}}
: CS1 maint: archived copy as title (link)
Further reading
- McCartney, Scott (1999). ENIAC: The Triumphs and Tragedies of the World's First Computer. ISBN 0-8027-1348-3.
- Shurkin, Joel N. (1996). Engines of the Mind: The Evolution of the Computer from Mainframes to Microprocessors. ISBN 0-393-01804-0.
- S2CID 20820998.
- ISBN 0-932376-14-2.
- Norberg, Arthur L. (2005-06-01). Computers and Commerce: A Study of Technology and Management at Eckert–Mauchly Computer Company, Engineering Research Associates, and Remington Rand, 1946-1957. ISBN 0-262-14090-X.
- LCCN 79-90567.
External links
- Oral history interview with J. Presper Eckert at Charles Babbage Institute, University of Minnesota, Minneapolis. Eckert, a co-inventor of the ENIAC, discusses its development at the University of Pennsylvania and the interaction of the personnel at the Moore School.
- John W. Mauchly and the Development of the ENIAC Computer - by Asaf Goldschmidt and Atsushi Akera, An Exhibition in the Department of Special Collections Van Pelt Library, University of Pennsylvania
- Mauchly: The Computer and the Skateboard. The only work to contain archival footage of John Mauchly speaking about the development of the ENIAC.
- O'Connor, John J.; Robertson, Edmund F., "John Mauchly", MacTutor History of Mathematics Archive, University of St Andrews