This text provides the reader with comprehensive coverage of the computer concepts needed to be understood by all people who will be interacting with computers. Included in the book are subjects such as interactive and batch processing systems, input to the computer, obtaining output from the computer, data communications, programming, operating systems, systems software and systems analysis and design. Well illustrated with hundreds of four-colour drawings and photographs, the book provides an exciting introduction to the world of computers. An important feature of this book is the coverage of widely used application software packages, including a step-by-step explanation on how to use electronic spreadsheet software, word processing software and database software. Featured are: SuperCalc3; Wordstar; and dBase III. This book should be of interest to degree and diploma students on introductory courses in computing.