This paper discusses the styles of computer-based learning and computer-based training in terms of their fundamental characteristics, including balance of control between program and learner, and the kinds of learning activity they induce. Learning and training are not considered to be intrinsically different in practice, and styles such as drill-and-practice, tutorial, simulation, and modelling are discussed with reference to both. Descriptions of current implementations of each of these styles include a critique of their advantages and disadvantages: (1) TICCIT (Time-Shared Interactive Computer-Controlled Television); (2) Educational Technology Center, University of California at Irvine; (3) CAISMS (Computer Assisted Study Management System), University of Illinois; and (4) the LOGO Laboratory, Massachusetts Institute of Technology (MIT). In conclusion, the likely educational potentials of the new media are considered, and an appropriate model for courseware development is suggested. (26 references) (Author/EW)