This version of a thesis prepared to develop computer-assisted lessons teach the electric system design course code 08-021-423 CAI (Computer Assisted Instruction) Electrical System Design, with the purpose to create facilities for those who want to study and are interested in research. Electric system design by applied computer technology To manage information about the slide. The combination of harmony and systematic To present content knowledge is appropriate according to the purpose and description of electrical system design efficiency in learning and responding with better learners. Which develop computer-assisted lessons taught in this program are created using the Adobe Captivate 8.