APA stands for All Points Addressable, also referred to as pixel addressable.
On a monitor, or any form of display device, the dot matrix is the pattern which represents characters, images and symbols when screening information.
This also involves a pixel, the smallest element of a picture which can be controlled on the screen.
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All Points Addressable
Standard Definition Exists?
APA refers to an arrangement whereby bits or cells can be individually manipulated, as opposed to rewriting the whole array, or regions such as characters, every time a change is needed.