Qualstar Corp. engages in the manufacture and trade of data storage systems. It operates through the Power Supplies and Data Storage segment. The Power Supplies segment designs, produces, and distributes power supplies used to convert alternating current line voltage to direct current voltages of electronic equipment. The Data Storage segment configures to order, supports, and sells data storage devices used to store, retrieve and manage electronic data in network computing environments. The company was founded by William J. Gervais and Richard A. Nelson in 1984 and is headquartered in Camarillo, CA.