American Power Conversion Corporation
Designs, develops, manufactures and markets power protection equipment and associated software services and accessories for computer and computer related equipment. (Nasdaq: APCC) http://www.apcc.com/
MGE UPS Systems
Global provider of power quality solutions designed to increase the availability and uptime of mission-critical applications or processes, from a simple desktop PC to a large Internet Data Center or a semi-conductor manufacturing plant. http://www.mgeups.com