The need for an integrated approach to the design of complex engineering systems involving electronic engineering, mechanical engineering and computing has become increasingly apparent in recent years and has led to the growth of the concept of mechatronics. However, it is a concept which is as yet not particularly well defined; a broad range of interpretations has been placed upon it. The following definition has been adopted within the EEe: Mechatronics is the synergetic combination of precision mechanical engineering, electronic co. ntrol and systems thinking in the design of products and processes. From this definition it is clear that mechatronics is not itself a separate discipline within the overall spectrum of engineering but rather represents an integration across a number of different fields within engineering. This text is therefore an attempt to set out the nature of mechatronics for a broad engineering audience. In order to achieve this objective the text aims to provide an indication of the range and scope of a mechatronic approach to the design of engineering systems and to identify the major areas of technology involved in such systems. It has its origins in the engineering degree course at Lancaster University and, specifically, in Professor Michael French's concept that engineering design should form a connecting theme throughout the whole of this course.