“A biophysicist is a physiologist who knows how to fix an amplifier.” Thus spake Walter A. Rosenblith of MIT's Research Laboratory for Electronics during his discussion of signal processing in biological systems at the Symposium on Biophysics of the New York State Section of the American Physical Society. This symposium, held in the General Electric Research Laboratory auditorium at The Knolls, Schenectady, N.Y., April 19 and 20, was the eighth in the series of semiannual meetings of the Section devoted to special topics in physics.* It was held in conjunction with the 25th anniversary celebration of the founding of the Section at Union College.