The circuit analysis book used in the department in the mid- and late 1940s was Introduction to Circuit Analysis by Abner R. Knight and Gilbert H. Fett. Although generally a popular book, it was noted for its difficult problems. The students were said to have stated that it contained four types of problems:

those that only the smartest students could solve;

those that only Knight and Fett could solve;

those that only God and Fett could solve; and

those that only Fett could solve.

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Centennial History of the Department of ECE
University of Illinois at Urbana-Champaign
Electrical and Computer Engineering Department
ECE Publications