This work on information processing is intended for candidates working towards BTEC National Information Processing 1 and 2, and candidates for other examinations set by ACCA (Business Mathematics and Information Technology); AAT (Elements of Information Systems, and Analysis and Design of Information Systems); CIMA (Information Technology Management); CIB (Business Calculations); IDPM (Data Processing I and II); CBSI (Management Services - Computers and Information Processing); RSA (Computers in Data Processing); and LCCI (Information Processing - second and third levels). This second edition includes material on cellular communication, document image processing, multimedia, electronic data interchange and virtual reality. It also offers information on optical storage, database technology and printers and incorporates new sections on the role of local area networks and computer-supported co-operative work. The book is further enhanced by the addition of new case studies, including one on the use of information technology in a small business, and by a number of new exercises encompassing the revised and updated material.