A family of popular, handheld game consoles from Nintendo that features dual screens (the "DS"). The top screen is where the game is viewed and played while the bottom touchscreen is used to change settings and make game and user level selections. Introduced in 2004, the original DS was followed by the DS Lite, DSi, DSi XL and the 3DS. As of 2011, the DS family outsold all other products from the company, including the very popular Game Boy (introduced 1989), GameCube (2001) and Wii (2006). The 3DS Autostereo Screen Introduced in 2011, the 3DS provides a glasses-free 3D screen, using a parallax barrier that is adjustable to the amount of visual depth the user desires (see parallax 3D and 3D visualization). See video game console and gamer.