Because the current Council for Educational Technology (CET) open learning systems (OLS) program is ending and the new OLS program being planned has very different concerns, this report reviews the initial program, assesses its impact since 1975, and identifies factors which aided its success as an innovative program. Aims and objectives for each of the project's three phases are given, and the main aspects of the work are generally outlined. Good timing, a clearly identified target group, the early identification of a transferable model, and carefully-considered program objectives are identified as crucial to the effective promotion of open learning systems by project staff. Examples of methods used to overcome inertia in the system which would prevent innovation are outlined. Though the program has not been subject to formal evaluation, a subjective assessment of its major achievements is given. The main problems facing further spread of OLS in public sector institutions are listed, as well as a brief outline of the next stage in CET's OLS work. Twenty-one references are listed. (Author/LMM)