Career
He received an Sc. D in Electrical Engineering from MIT in 1966. Starting in 1966, he was a faculty member of the Department of Electrical Engineering and Computer Science at MIT.
One of his earliest involvements with computers was with MIT's CTSS time-sharing operating 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. His contributions to Multics included the now-standard kernel stack switching method of process switching, as well as often-cited work on the security architecture for shared information systems.
In the late 1970s and early 1980s, the research group he led, the Computer Systems Research group of MIT's Laboratory for Computer Science, was one of the key players in the development of the Internet, and ring network technology for local area networks. One of his notable accomplishments was a key patent used by the Proteon ProNet ring network. Perhaps his most notable contribution in that area was his contribution to the End-to-end principle in systems design, which is one of the important underlying principles that governs the operation of the Internet.
From 1984 through 1988 he served as Technical Director of MIT 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 he retired from his full-time faculty position, but continued writing and teaching part-time at MIT.
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