Increasing 9.7 market share points from May 2012, Lenovo lands in the No. 3 spot for best-selling tablet brand for the month of May. Lenovo's tablet contenders came from the ThinkPad line, specifically the 10.1-inch, 64-GB ThinkPad Tablet 2. The ThinkPad Tablet 2 runs the Windows 8 operating system and a 1.8-GHz Intel Atom Processor. The tablet also comes loaded with Office Home and Student 2013 software.