In recent decades, the development of the motor vehicle has been marked by the introduction of elec- tronics. At first, electronic systems were used to control the engine (electronic fuel-injection systems), then electronic components entered the domain of driving safety (e.g. antilock brake system, ABS). More recently, completely new fields of application have emerged in the areas of driving assistance, infotainment and communication as a result of continuous advancements in semiconductor technol- ogy. Consequently, the proportion of electrics and electronics in the motor vehicle has continuously increased. A typical feature of many of these new systems is that they no longer perform their function as stand- alone systems but operate in interaction with other systems. If the flow of information between these systems is to be maintained, the electronic control units must be networked with each other. Various bus systems have been developed for this purpose. Networking in the motor vehicle is a topic that receives comprehensive coverage in this book.