The Taichi21-DH71 11.6 Ultrabook Computer from ASUS is a unique Ultrabook computer. It features dual 11.6 IPS displays with 16:9 aspect ratios and Full HD 1920 x 1080 native resolutions, thanks to the integrated Intel HD Graphics 4000. The main screen inside the lid is a normal laptop display while the outer lid features a secondary touchscreen display. Both screens can be used independently of each other so two people can use them at the same time. The inside screen is a traditional Full HD widescreen IPS (in-plane switching) display. The outer screen is also a Full HD IPS display, but it also supports 10-finger touch gestures, such as tap, slide, drag, pinch-to-zoom and more. There is also an included stylus, which can be combined with the outer touchscreen's 256 levels of pressure sensitivity for accurate handwriting simulation. This ASUS Taichi21 Ultrabook also features the Windows 8 (64-bit) operating system. With a redesigned Start screen and an emphasis on tiles that update real-time and capacitive touchscreen support, Windows 8 provides a unique user experience. The system is powered by a dual-core Ivy Bridge 1.9GHz Intel Core i7-3517U processor. There are also 4GB of DDR3 onboard RAM, a 256GB solid state drive, 10/100Mbps Fast Ethernet, 802.11b/g/n Wi-Fi, Bluetooth 4.0, ASUS SonicMaster technology and an integrated webcam.