Lenovo third-largest computer maker worldwide by volume. In regards to the purchase of IBM's personal computer division, Liu Chuanzhi said, "We benefited in three ways from the IBM acquisition. We got the ThinkPad brand, IBM's more advanced PC manufacturing technology and the company's international resources, such as its global sales channels and operation teams. These three elements have shored up our sales revenue in the past several years." IBM acquired an 18.9% shareholding in Lenovo in 2005 as part of Lenovo's purchase of IBM's personal computing division. Since then, IBM has steadily reduced its holdings of Lenovo stock. In July 2008,
ThinkPad Tablet Lenovo said he believed the ThinkPad Tablet to be "the weapon of choice for business success". In his article on the development of the Tablet, he indicated that every design detail was subjected to multiple design reviews, including basic elements such as the placement of the logo. A challenge was indicated to be designing and integrating a digitizer pen into the Tablet, which already had a "crowded interior". This required a study of pen barrel diameter and the balancing of batteries, digitizer technology components, ergonomics, and storage space constraints for the pen itself. Additionally, dowel rods were used for diameter