In 1947, he became a research fellow at Harvard University's Psycho-Acoustic Laboratory.
He joined the MIT faculty in 1951 as an associate professor of communications biophysics in the Department of Electrical Engineering, was tenured in 1957, chair of the faculty from 1967 to 1969, and named Institute Professor in 1975.
He helped to found the Whitaker College, Harvard-MIT Joint Center for Urban Studies, as well as the Program in Science, Technology, and Society.
He was a pioneer in using computers to emulate the behavior of the human brain.
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