O2Micro International Ltd was incorporated in the state of California in the United States of America on March 29, 1995. In March 1997, O2Micro International Limited was formed in the Cayman Islands and all authorized and outstanding common stock, preferred stock, and stock options of O2Micro, Inc. were exchanged for the Company's ordinary shares, preference shares, and stock options with identical rights and preferences. The Company along with its subsidiaries designs, develops and markets development power management components for the Computer, Consumer, Industrial, Automotive and Communications markets. The Company operates in two reportable segments, including Integrated Circuit Group and Network Security Group. The Integrated Circuit Group's core products and principal source of revenue are its power management semiconductors. These semiconductor products are produced with digital, analog, and mixed signal integrated circuit manufacturing processes. The Network Security Group's system security solution products include support for VPN and firewalls, which provide security functions between computer systems and networks, including the transmission of data across the Internet. It sells its products to OEMs, ODMs and module makers.