单词	pointing device
释义	pointing device point·ing device (poin′tĭng)n. Computers An input device, such as a mouse, joystick, or trackball, with which one can move or manipulate a cursor or pointer on a GUI. Translations pointing device pointing device [′pȯint·iŋ di‚vīs] (computer science) A handheld device, such as a mouse, puck, or stylus, that controls a position indicator on a display screen. Also known as pick device. pointing device (hardware)Any hardware component that allows a user to inputspatial data to a computer. CAD systems and Graphical User Interfaces (GUI) allow the user to control and provide datato the computer using physical "gestures" - point, click,and drag - typically by moving a hand-held mouse acrossthe surface of the physical desktop and activating switches onthe mouse. Movements of the pointing device are echoed on agraphical representation of a desktop on the screen bymovements of the mouse pointer and other visual changes. While the most common pointing device by far is a mouse, otherkinds include tracker ball, trackpad, lightpen, variouskinds of digitising tablets which use a stylus, and even aspecial "data glove" that translates the user's movements tocomputer gestures. pointing device An input device used to move the pointer (cursor) on screen. The major pointing device is the mouse for the desktop computer and the touchpad for the laptop, although many road warriors bring along a mouse. Pointing sticks are available on some laptops, and a small number of users prefer trackballs over the mouse. See mouse, touchpad, trackball and pointing stick. The Major Pointing Devices Clockwise from the mouse at the upper left are the trackball, pointing stick (red tip) and touchpad. Freedom of Choice Some laptops provide a pointing stick and touchpad on the same machine, both of which are active at the same time. (Image courtesy of Winbook Computer Corporation, www.winbook.com) pointing device pointing device A type of input device for sending commands to a computer. Moving the device results in movement of a cursor on the monitor or computer screen. Pointing devices range from the conventional desktop mouse, trackball, and touch-sensitive screens to infrared and ultrasound pointers mounted on the head. See: light pointer; switchSee also: device FinancialSeemouse
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