Before actually creating a communications system, engineers produce models of these systems to predict future problems. A communications system can encounter any number of difficulties that can affect performance and quality. Allowing engineers to simulate communications systems in an easy and effective manner without incurring the costs of establishing a real-world simulation, STÆDT is a versatile, powerful program for simulation of data signals and processes on personal computers. Engineers and students use it for analysis and evaluation of communications systems. This set package includes the complete STÆDT software on disk, plus a reference manual, Simulation The STÆDT Program , as well as the companion textbook, Simulation Models of Communication Signals and Processes ISBN 0-471-51964-2).