The revised Engineer's Relay Handbook, 6^th Edition builds on the basics of relay technologies detailed in previous editions, while adding content covering new technologies such as MEMS relays and semiconductor basics with concomitant solid-state relays and switches. It also includes an expanded glossary of the latest relay and switch terms from national and international sources. The book is produced by the Relay and Switch Industry Association (RSIA), formerly the National Association of Relay Manufacturers (NARM). RSIA is an affiliate of ECA, the Electronic Components, Assemblies and Materials Association. The book includes major contributions from Tyco Electronics.