This dictionary contains nearly 4500 terms used in computing. Not only are technical terms in software and hardware explained, but the broader context of any social and legal implications is provided. For this third edition, over 550 new entries have been added and many of the existing entries have been updated. This reflects recent advances in all aspects of computing, especially new approaches to both programming and computer organization and architecture (and the associated new languages). In addition, the new edition covers developments in the software and hardware associated with microcomputing, networking, and information technology. The entries have been written by practitioners in all branches of computing and associated fields. Diagrams and tables supplement the text where appropriate.