a system. For instance, it can allow the user to switch between a series of options, zoom in or out, or increment/decrement any value. In first-person shooter computer games, scroll-wheels are often used to switch between weapons, zoom in/out a telescopic sight, or even to allow the player to lean left and right if horizontal scrolling is available. CAD applications such as Autodesk's AutoCAD use the mouse wheel to navigate the space in which the user is drawing. This has become a de facto standard in many 3D applications, with Trimble's SketchUp (formerly owned by Google) using the scroll wheel to zoom in and out in the 3D space, while a wheel-click and a mouse drag is orbit. A few mobile phones have physical scroll wheels, such as the Nokia 7110. See also Scroll lock References Computer mice User interface techniques Wheels