A study was conducted from March 1976 through June 1980 on the application and feasibility of a computer micro-system as an interactive tutorial instructional tool in a self-contained classroom. Literature on computer assisted instruction (CAI), hardware, and software was examined. Individualized CAI materials for industrial arts and technology electronics were generated. An instructional model and guidelines for its use were developed. Microprocessor system instructional effectiveness and human factors associated with its classroom use were examined. Findings include the following: (1) CAI program generation is possible only if instructors develop instructional units which stand alone yet interrelate with each other; (2) instructors must consider individual student differences and use student feedback extensively; (3) computers purchased for CAI use should be standard, meet certain minimum capacity requirements, and have readily available maintenance services; (4) most students found CAI as good or better than other media in teaching concepts and skills, felt CAI helped them better meet course objectives, and found lessons readable and easily understood; (5) CAI lessons showed a positive correlation to student grades. Findings affirm CAI feasibility. Investigation of microcomputers for simulation purposes or for use by the handicapped are recommended. (A 100-page appendix contains CAI sample "coursewriter," computer programs, evaluation forms, course outlines, a pretest, list of microcomputer suppliers by product/system, and a bibliography.) (MN)