Concept

Hewitt Crane

Summary
Hewitt D. Crane (1927–2008) was an American engineer best known for his pioneering work at SRI International on ERMA (Electronic Recording Machine, Accounting), for Bank of America, magnetic digital logic, neuristor logic, the development of an eye-movement tracking device, and a pen-input device for computers. Early life and career Crane was born in 1927 in Jersey City, New Jersey. After a stint in the United States Navy as a radar technician during World War II, he worked as a computer maintenance technician for IBM (1949–1952), followed by working on digital computer design under the leadership of John von Neumann at the Institute for Advanced Study, in Princeton, New Jersey (IAS is not affiliated with Princeton University). He then developed magnetic multiaperture devices (MADs) at RCA Laboratories (now Sarnoff Corporation). In order to develop magnetic logic, Crane controlled the direction of bit flow in magnetic ferrite memory cores. Ferrite logic circuits are inherent
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