The microprocessor has become commonplace in our technological society. Everything from dish washers to astronomical telescopes have chips controlling their operation. While the development of applications for computers has been in constant flux since their introduction, the principles of computer operation and of their use in sensing and control have remained stable. Those are the primary subjects of this book. Once a basic understanding of the principles has been built, further detailed knowledge can be acquired later as the need arises.

This book is designed to be accompanied by extensive laboratory work. Over the years the engineering curriculum has focused more and more on the lecture/recitation format. This has led to an ever increasing emphasis on theoretical developments and a loss of contact with the physical basis of engineering and science. The laboratory provides a vital experience in linking theory with physical reality. It also provides the satisfaction of building something and making it work.

Not all computers are suitable for laboratory use. Large mainframe computers are fast and can handle large amounts of data but are awkward to connect to laboratory equipment. At the other end of the scale, microprocessors are included in many laboratory devices but are programmed to perform only a restricted set of duties. Mini and microcomputers have enough speed and memory for all but the most demanding applications but yet are small enough to be dedicated to individual projects and therefore are widely used in the laboratory.

With the technological strides of recent years, microcomputers (or personal computers) have prodigious capabilities.