Computer-based instruction (CBI) encompasses the functions of computer administered and managed instruction supplemented by utilities and interfaces. The course author's function in computer-administered instruction (CAI) is to construct the lesson for input in one of three formats: (1) batch entry used by those with knowledge of programing language, (2) user- initiate mode directly typed into the file, or (3) interactive coaching/prompting, a dialogue format for those without programing knowledge. To aid the author, answer analysis techniques, branching, student aid and task interruption controls, editing, and lesson formats are available. Students are preassigned or given free access to lessons. Computer-managed instruction (CMI) involves human management using tools provided by CBI--i.e., required data, assignment of system users, catalog construction, message capabilities, report control and lesson verification. The utilities of flowcharting, the calculator, and automated report generation language (ARGL), internal and external interfaces of hardware, and graphic and audiovisual aids enhance the capabilities of the system. Factors to consider in determining the impact of this CBI system are cost, installation core requirements, and acceptability by the user. Descriptions of answer analyses and standard system reports are appended. (KP)