)(1) In graphical user interfaces, a pointer is a small arrow or other symbol on the display screen that moves as you move the mouse. You can select commands and options by positioning the tip of the arrow over the desired choice and clicking a mouse button. Many text processing programs use an I-beam pointer.
Pointers are often referred to as mouse pointers.
(2) A variable that contains the address of a location in memory. The location is the starting point of an allocated object, such as an object or value type, or the element of an array.
- pointing device
A device with which you can control the movement of the pointer to select items on a display screen. Examples of pointing devices include mice, trackballs, joysticks, touchpads, and light pens.
- pointing stick
A pointing device first developed by IBM for its notebook computers that consists of a miniature joystick, usually with a rubber eraser-head tip, positioned somewhere between the keys on the keyboard. Most pointing sticks are pressure-sensitive, so the pointer moves faster when more pressure is applied.
A lens filter commonly used in photography and digital photography that polarizes the light as it enters the camera lens. Polarizers can be used to help darken a bright sky or remove reflections and glare from objects. Also called a polarizing filter.
- policy awareness
A function of information systems that provides users of that specific system with accessible, understandable views of the policies associated with information resources. Policy awareness provides representations of policies in order to facilitate compliance with stated rules, and enables accountability when rules are intentionally or accidentally broken.
(1) Polling is a CAM. In a master/slave scenario, the master queries each slave device in turn as to whether it has any data to transmit. If the slave answers yes then the device is permitted to transmit its data. If the slave answers no then the master moves on and polls the next slave […]