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== Usage in computers ==
Although the output of modern computers is generally all in the form of dot matrices (technically speaking), computers may internally store data as either a dot matrix or as a vector pattern of lines and curves. Vector data encoding requires less memory and less data storage, in situations where the shapes may need to be resized, as with [[font]] typefaces. For maximum image quality using only dot matrix fonts, it would be necessary to store a separate dot matrix pattern for the many different potential point sizes that might be used. Instead, a single group of vector shapes is used to render all the specific dot matrix patterns needed for the current display or printing task.
===All points addressable===
'''All points addressable''' ('''APA'''), or '''pixel addressable''', in the context of a [[dot matrix]] on a [[computer monitor]] or any [[display device]] consisting of a [[pixel]] array, 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.<ref name=ibm>{{Citation
| last = Matick
| first = R.
| last2 = Ling
| first2 = D. T.
| last3 = Gupta
| first3 = S.
| last4 = Dill
| first4 = F.
| title = All points addressable raster display memory
| journal = [[IBM]] Journal of Research and Development
| volume = 28
| issue = 4
| pages = 379
| date = 2006
| origyear = 1984
| accessdate=2013-09-28
| url = http://domino.research.ibm.com/tchjr/journalindex.nsf/600cc5649e2871db852568150060213c/e09f8b694a6fc5b685256bfa0067f5d9 }}</ref><ref name=mit>{{Citation
| last = Gonzalez
| first = John Cambell
| author-link =
| title = Implementing a window system for an all points addressable display
| publisher = [[Massachusetts Institute of Technology]]
| editor-last = Zippel
| editor-first = Richard E.
| date = 1982
| url = http://hdl.handle.net/1721.1/27922
| archivedate = 2005-09-26
| accessdate=2013-09-28 }}</ref>
Generally, [[text mode]]s are not all-points-addressable, whereas [[graphics mode]]s are.<ref name=mit/> With the advent of more powerful computer graphics hardware, the use and importance of text-only display modes has declined, and with graphics modes it is generally taken for granted that they are all-points-addressable.
==LED matrix==
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