This course in electronic devices and systems is one of 16 courses in the Energy Technology Series developed for an Energy Conservation-and-Use Technology curriculum. Intended for use in two-year postsecondary technical institutions to prepare technicians for employment, the courses are also useful in industry for updating employees in company-sponsored training programs. Comprised of seven modules, the course is designed to provide the student with a working knowledge of modern electronic devices and the circuits in which they are employed. Electronic troubleshooting techniques are stressed. Topics covered include rectifiers, transistors, SCRs and triacs, vacuum and gaseous tubes, filters, amplifier circuits, operational amplifiers, noise reduction, digital circuits, and display devices. Written by a technical expert and approved by industry representatives, each module contains the following elements: introduction, prerequisites, objectives, subject matter, exercises, laboratory materials, laboratory procedures (experiment section for hands-on portion), data tables (included in most basic courses to help students learn to collect or organize data), references, and glossary. Module titles are Concepts and Applications of Input and Output, Vacuum Tubes, Solid State Devices, Integrated Circuits, Indicators and Displays, Digital Techniques, and Analog and Digital Systems. (YLB)