This paper describes an algorithm with which the user can compute frequency responses on a small pro grammable calculator. Inexpensive calculators like the Hewlett-Packard 25 allow such calculations for a system containing as many as four poles and zeros. The user must enter the proper sequence for a pole or zero, but the process is simple; the user does not have to depend on (and wait for) a large computer. The paper presents the solution of a typical problem.
