This paper gives an account of the use of the CoSy conferencing system in an introductory information technology course at the British Open University in 1988. A discussion of the integration of the CoSy system into the existing curriculum is followed by descriptions of the conferencing environment and the interface to CoSy. Profiles of students and teachers involved with the course are also provided. The nature and amount of use of the CoSy system are then examined in light of eight original expectations regarding convenience, increased access to help, equal access, CoSy as a new learning medium, social needs, the conceptual model of conferencing, technical difficulties, and variations in moderating styles. Both quantitative and qualitative data are presented for each of these areas. The paper concludes with a final evaluation of the data from four perspectives: (1) the value of computer-mediated communication for students; (2) the implications of its use for tutors; (3) the integration of this medium into the Open University's distance learning package; and (4) the impact of computer-mediated communication on the organization of the university. Appendixes include an electronic campus map; demographic data; and data on students' past experience with computer-mediated communication and their level of use of the technology during the course. (GL)