Concept

Jerry Saltzer

Summary
Jerome Howard "Jerry" Saltzer (born October 9, 1939) is an American computer scientist. Jerry Saltzer received an ScD in Electrical Engineering from MIT in 1966. His dissertation 'Traffic Control in a Multiplexed System' was advised by Fernando Corbató. In 1966, he joined the faculty of the Department of Electrical Engineering and Computer Science at MIT. One of Saltzer's earliest involvements with computers was with MIT's Compatible Time-Sharing System in the early 1960s. In the later 1960s and early 1970s, he was one of the team leaders of the Multics operating system project. Multics, though not particularly commercially successful in itself, has had a major impact on all subsequent operating systems; in particular, it was an inspiration for Ken Thompson to develop Unix. Saltzer's contributions to Multics included the now-standard kernel stack switching method of process switching, as well as oft-cited work on the security architecture for shared information systems. Saltzer led the Computer Systems Research group of MIT's Laboratory for Computer Science. In the late 1970s and early 1980s, the Computer Systems Research group was one of the key players in the development of the Internet and ring network technology for local area networks. During this time, Saltzer patented the Proteon ProNet ring network. Another contribution in that area was the end-to-end principle in systems design (Saltzer and Schroeder's design principles), which is one of the important underlying principles that governs the operation of the Internet. From 1984 to 1988 Saltzer served as Technical Director of MIT's Project Athena. "Saltzer@mit.edu" is one of the few Athena usernames with a capital letter, and legend has it that several special case hacks were required to support this functionality. In September 1995 Saltzer retired from his full-time faculty position, but continued writing and teaching part-time at MIT. Saltzer is known to all (colleagues, students, friends and family) as "Jerry". In 1961 he married Marlys Anne Hughes.
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