Instructional Design Expert (ID Expert) is a prototype instructional design expert system which supports the instructional design phase of instructional system development. Phase 2 of ID Expert was implemented using S.1 expert system language on the VAX computer. The user interface was text-based, consisting of a question/answer dialogue primarily controlled by the program. The goals of phase 3 were to transport the system from the minicomputer environment onto a desktop, and to improve the user interface to support user-initiated actions in a highly graphic, interactive environment. There was a shift in emphasis from a rule-oriented expert system to a frame-based expert system. The set of frames together constitute an expert system distributed between Hypercard and Nexpert, and across the Hypercard frames as well, facilitating user-initiated interaction with these mini-experts. The object-oriented programming capabilities of Hypercard were utilized, allowing the explicit graphic representation of frames and their relations and the direct manipulation of the frames and their components. This report includes an introduction to phase 3 of the project; a description of the domain of ID Expert; a top level view of the system structure; and a detailed description of the system, including the system components, user interface, inferencing, and system outputs. A sample ID Expert system is described and a transcript is included. (GL)