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The SDS Sigma series is a series of third generation computers [1] [2] [3] that were introduced by Scientific Data Systems of the United States in 1966. [4] The first machines in the series are the 16-bit Sigma 2 and the 32-bit Sigma 7; the Sigma 7 was the first 32-bit computer released by SDS. At the time, the only competition for the Sigma 7 ...
Scientific Data Systems. Scientific Data Systems ( SDS ), was an American computer company founded in September 1961 by Max Palevsky, Arthur Rock and Robert Beck, veterans of Packard Bell Corporation and Bendix, along with eleven other computer scientists. SDS was the first to employ silicon transistors, and was an early adopter of integrated ...
The Xerox Sigma 9, also known as the XDS Sigma 9, was a high-speed, general purpose computer. Xerox first became interested in office automation through computers in 1969 and purchased Scientific Data Systems or SDS. They then renamed the division Xerox Data Systems or XDS; they saw limited success, and the division was ultimately sold to ...
Sigma ( / ˈsɪɡmə / SIG-mə; [1] uppercase Σ, lowercase σ, lowercase in word-final position ς; Greek: σίγμα) is the eighteenth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 200. In general mathematics, uppercase Σ is used as an operator for summation.
There are generally four classes of software used to support the Six Sigma process improvement protocol: Analysis tools, which are used to perform statistical or process analysis; Program management tools, used to manage and track a corporation's entire Six Sigma program; DMAIC and Lean online project collaboration tools for local and global teams;
David Mark Siegel (born 1961) is an American computer scientist, entrepreneur, and philanthropist.He co-founded Two Sigma, where he currently serves as co-chairman. Siegel has written for Business Insider, The New York Times, Financial Times and similar publications on topics including machine learning, the future of work, and the impact of algorithms used by search and social media companies.
The SDS 940 was Scientific Data Systems ' (SDS) first machine designed to directly support time-sharing. The 940 was based on the SDS 930 's 24-bit CPU, with additional circuitry to provide protected memory and virtual memory . It was announced in February 1966 and shipped in April, becoming a major part of Tymshare 's expansion during the 1960s.
Two Sigma Investments was founded in 2001 by John Overdeck, David Siegel and Mark Pickard. Siegel is a computer science Ph.D. from the Massachusetts Institute of Technology who worked for Tudor Investments, and Overdeck is an International Mathematical Olympiad Silver Medalist who subsequently studied mathematics at Stanford University and worked for Jeff Bezos in Amazon.com's early days.
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