― World's Thinnest Ultrabook, Lenovo ThinkPad X1 Carbon Official Start Sale August 21 - Are you still remember about ultrabook's Lenovo, the Lenovo ThinkPad X1 Carbon ? This Ultrabook Ultrabook is the lightest weight and thinnest in the world in size. It comes to weight 1.36kg with a thickness of 18mm. ∙ Now, Lenovo has officially announced that the laptop is going to be found in the market on August 21. As a first step, the United States is the first goal of the ultrabook. Regarding the [...].