By Hill, Raymond
By Hughes, Austin
By Nadel, Steven, et al
By Cox, Jim
By Sanderson, Henry
By Capilano Computing
By Stanislaw H. Zak (Professor Electrical and Computer Engineering, Professor Electrical and Computer Engineering, Purdue University)
By Dana F. Geiger
By M. Prutton (Professor of Physics, Professor of Physics, University of York)
By James Clerk Maxwell (late Professor, late Professor, Trinity College, Cambridge)