This book combines computer system reliability, safety, usability, and other related topics into a single volume and to eliminate the need to consult many different and diverse sources in obtaining desired information. The topics covered are treated in such a manner that readers require no previous knowledge to understand the contents. The book contains examples along with their solutions and numerous problems at the end of each chapter to test reader comprehension. The sources of most of the material presented will be given in the reference section at the end of each chapter.