For electrical engineers, considers the creation and maintenance of a power supply that will not cause the loss of data or damage to sensitive equipment (particularly computers) by taking a break or getting sloppy for a second or two. Authors from manufacturers, equipment designers, and user companies overview the subject, describe the equipment and systems used, cite applications in air transport and telecommunications, and discuss the more technical topics of harmonic distortion, reliability, and the specification of equipment. No bibliography. Annotation copyright by Book News, Inc., Portland, OR