Lenovo personal computer brand in China since 1997. In 2001, "Business Week" named him one of Asia's rising stars in business. Yang was president and CEO of Lenovo until 2004, when Lenovo closed its acquisition of IBM's PC division, after which Yang was succeeded as Lenovo CEO by IBM's Stephen M. Ward, Jr. Ward was succeeded by Bill Amelio on 20 December 2005. In February 2009, Yang replaced Amelio as CEO and has served in that capacity ever since. Yang was chairman of Lenovo's board from 2004 to 2008, and returned as chairman in 2012 alongside his role as CEO. In
ThinkPad An 11.6" Edge 11 model was offered, but not available in the United States. The S Series is positioned as a mid-range ThinkPad offering, containing ultrabooks derived from the Edge Series. As of August 2013, the S Series includes S531 and S440 models; their cases are made of aluminum and magnesium alloy, available in silver and gunmetal colors. The Lenovo ThinkPad Twist (S230u) is a laptop/tablet computer hybrid aimed at high-end users. The Twist gets its name from its screen's ability to twist in a manner that converts the device into a tablet. The Twist has a 12.5" screen and