AOpen is a minor Taiwanese electronics manufacturer that makes computers and its parts. AOpen used to be the Open System Business Unit of Acer Computer Inc. which designed, manufactured and sold computer components. It was incorporated in December 1996 as a subsidiary of Acer Group with an initial public offering at the Taiwan stock exchange in August 2002. It is also the first subsidiary that established the entrepreneurship paradigm in the pan-Acer Group. At that time, AOpen's major shareholder was the Wistron Group. In 2018 AOpen became a partner of the pan-Acer Group again as the business-to-business branch of the computing industry. They are perhaps most well known for their mobile on desktop, which implements Intel's Pentium M platform on desktop motherboards. Because the Pentium 4 and other NetBurst CPUs proved less energy efficient than the Pentium M, in late 2004 and early 2005, many manufacturers introduced desktop motherboards for the mobile Pentium M, AOpen being one of the first. Wikipedia