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IBM Journal of Research and Development  
Volume 25, Number 5, Page 363 (1981)
25th Anniversary Issue
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The Architecture of IBM's Early Computers

by C. J. Bashe, W. Buchholz, G. V. Hawkins, J. J. Ingram, N. Rochester
Most of the early computers made by IBM for commercial production are briefly described with an emphasis on architecture and performance. The description covers a period of fifteen years, starting with the design of an experimental machine in 1949 and extending to, but not including, the announcement in 1964 of System/360.
Related Subjects: Arithmetic and logical unit design; Computer organization and design