Computer scientists have developed an interactive, graphical display system for pole-zero map analysis. They designed it for use as an educational tool in teaching introductory courses in automatic control systems. The facilities allow the user to specify a control system and an input function in the form of a pole-zero map and then examine the resulting transient response. The system's hardware consists of an IBM Model 1 Display Unit attached to an IBM System/360 Model 40 computer. (Author)