Dewdney, A. K. The armchair universe : an exploration of computer worlds / by A.K. Dewdney. - New York, N.Y. : W.H. Freeman and Company, 1988. - xiii, 330 p. 8 p. of plates. Includes bibliographical references : (p. 309-313) and index. ISBN: 071671938X Subjects--Topical Terms: Microcomputers--Programming.Computer software.