Michael Jay Geier is a former professional electronics technician and designer. He is the author of the first two editions of How to Diagnose and Fix Everything Electronic, as well as How to Get the Most from Your Home Entertainment Electronics, all published by McGraw Hill. In addition, he authored approximately 250 published magazine articles on various topics in electronics, two of which were cited in U.S. patents. Geier has also written software and developed hardware for augmentative communications systems for children with cerebral palsy, and has developed various industrial and diagnostic devices.