This document summarizes Microsoft's Surface tablet computers. It discusses the differences between the Surface RT and Surface Pro models, including their processors, operating systems, RAM, storage, and battery life. It also explains the touch and pen-based gestures used to interact with Surface, and some optional accessories like covers, mice, power supplies, and video adapters. Finally, it argues that Surface can replace both a laptop and tablet, providing the functionality of devices like the MacBook Air and iPad in a single product.