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Daniel Slotnick
Daniel Leonid Slotnick (1931–1985) was a mathematician and computer architect. Slotnick, in papers published with John Cocke in 1958, discussed the use of parallelism in numerical calculations for the first time. He later served as the chief architect of the ILLIAC IV supercomputer.〔
.〕 He was the principal investigator on a DARPA contract in the early 1970s that produced the ILLIAC IV and the ARPANET. It was a fairly large operation, with its own building on the campus of UIUC, originally called the Center for Advanced Computation but which is now the Astronomy Building. It was constructed by Burroughs Corporation, using some special chips made by Fairchild Semiconductor. Because of campus unrest due to the Vietnam war, and the Mansfield amendments the ILLIAC IV was completed and installed at Ames Research Center instead of UIUC, and Slotnick's Darpa contract was not renewed. In 1985, when IDA and NSA formed their supercomputing research facility in the DC area, Slotnick's widow donated his library to them. In 1987 the first issue of ''The Journal of Supercomputing'' contained a tribute to Slotnick.
==ARPANET==
Most of the development of the ARPANET took place at MIT's Lincoln Labs and BBN Technologies. However it was planned that ILLIAC IV would be on the network, and some work was funded by Slotnick's DARPA contract. For example, a standard character set was established, and also the Purdy Polynomial, a secure hash function to protect passwords on ARPANET. Ironically, when the ILLIAC IV project was moved to Ames Research Center, the computer could only be accessed by telephone: (415) 329-0740.
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