Qualstar Corp. engages in the manufacture and trade of storage and power supply solutions. It operates through the Power Supplies and Data Storage segments. Read More 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 manufactures and sells automated magnetic tape libraries for electronic data storage, retrieval, and management. The company was founded by William J. Gervais and Richard A. Nelson in 1984 and is headquartered in Simi Valley, CA.