To design a human-machine interface effectively, one must consider the disciplines of hardware and software development, design, and human-machine communication from the very beginning. The equal weighting of these four disciplines is what makes this textbook unique. It offers the reader a very practical introduction to the challenges of designing HMIs and is not presented in the style of scientific papers, but rather serves as a guide. No prior knowledge is required. For developers, it provides a variety of ready-made solutions, such as electronic circuits, programs for the 8051 microcontroller family, and decision aids for selecting the appropriate elements of an HMI.