Designed to provide a useful tool for the instruction and increased awareness of the growing number of computer users throughout the world, this edition of the dictionary was based on an information search which provided 22,000 separate definitions and concept explanations. Appended are an introduction to computer system principles and procedures, descriptions of computer systems personnel, management science topics, transition criteria and procedures, model building techniques, operations research, mathematical definitions, statistical definitions, number systems, flowcharting, computer languages, acronyms and abbreviations, and speculations about the future of computers. (SH)