Windows 8 represents a major departure from previous versions of Windows. It is based on the Metro design language, which facilitates a touchscreen user interface similar to mobile phones and tablets. Microsoft's Surface tablet, released in 2013, runs Windows 8. The version aims to work with both touchscreen and traditional keyboard-and-mouse systems. It has a tile-based screen with each tile representing a specific app. Users can access apps and switch between them by clicking or touching different areas of the screen.