This paper discusses four major developments in the use of media at the Open University: (1) the move from radio to audiocassettes; (2) use of broadcast television vs. videocassettes; (3) increased use of interactive video; and (4) CYCLOPS tutorials, which provide immediate two-way communication via the telephone together with visual pictures. Each new program is discussed in detail, including information on its costs and extent of current use. In conclusion, it is noted that the most substantial change was from radio to audiocassettes, a program that represented real cost savings because it employed low cost, easy, in-house technology. Other changes have come with less ease, and it is observed that although the change to videocassettes, videodiscs, CYCLOPS, or other programs does not necessarily entail reduced costs, these programs do provide additional benefits. (EW)