The document discusses the evolution of the definition and uses of tablets from early tablet computers running Windows to modern tablets running mobile operating systems. It provides examples of some early tablet PCs running Windows as well as specifications for several 2011 Android tablets including the Samsung Galaxy Tab 7.0 Plus, Samsung Galaxy Tab 8.9, Huawei IDEOS S7 Slim, Acer Iconia Tab A100, and Acer Iconia Tab A200.