A survey was made of microminiaturization of electronic equipment. Approximately 150 firms in the electronic equipment and parts industry were found to be energetically engaged in microminiaturization research, development, and technical support. A wide variety of fabrication techniques were used, ranging from vacuum, c equipment, Electronic circuits, Production, Manufacturinbons. Among methods used are spectrographic plates for photo resists, screen and photolithographic printing, micromachining, air abrasion, ultrasonic machining, and electronic etching. Microminiature circuits of some types are expected to be available soon for limited applications. Improved performance, resistance to environmental extremes, and increased reliability can be anticipated. Reduced size will eventually permit satellite payloads with highly sophisticated instrumentation and completely redundant control systems.