The University of Delaware's work with computer-based instruction since 1974 is summarized, with attention to the history and development of the Office of Computer-Based Instruction, university applications, outside user applications, and research and evaluation. PLATO was the system that met the university's criteria, which included: supporting instructional strategies such as gaming, testing, and self-paced instruction; a library of computer-based learning materials; a programming language that was easy to use; a student record-keeping capability to support educational research; computer graphics; and overall system reliability. Information is provided on credit and noncredit courses using computer-based instruction during 1983-1984. Activities of the 37 departments using computer-based instruction are summarized, and sample lessons and photographs are provided. Outside user applications are also described, including pre-college demonstrations and programming courses and courseware development. Materials include: a list of published lessons, a list of 1983-1984 conference and workshop presentations, a student evaluation form for PLATO, abstracts of computer-based education developments, and a catalog of PLATO and microcomputer programs under development. (SW)