The computer tutor : IBM personal computer edition : learning activities for homes and schools for the IBM PC and PCjr / Gary W. Orwig, William S. Hodges [illustrations by Jesse Clay]. Orwig, Gary W., 1945- Hodges, William S. Computer-assisted instruction. Activity programs in education. Educational games. LB1028.5 .O7 1984 371.39445 19 ORC Bibliography: p. 215-219. Boston : Little, Brown, c1984. c1984. 1984 Text x, 219 p. : eng The Little, Brown microcomputer bookshelf