Technical systems are shaping our everyday more and more. The aim of Engineering psychology is, to enable a simple and pleasant handling of these systems. Based on the human processing of information, this textbook describes the main areas of applications and methods. Regarding the design of systems, the release of information (display, sound, language) and the operation are to be taken into consideration. Next to interactions between humans and computers, assistance and automation are presenting completely new challenges to the user, which should be noted.