Difference between revisions of "Digital data"
Karl Jones (Talk | contribs) |
Karl Jones (Talk | contribs) (→See also) |
||
| Line 24: | Line 24: | ||
* [[Information theory]] | * [[Information theory]] | ||
* [[Information system]] | * [[Information system]] | ||
| + | * [[Metadata]] | ||
| + | * [[Timestamp]] | ||
== External links == | == External links == | ||
* [https://en.wikipedia.org/wiki/Digital_data Digital data] | * [https://en.wikipedia.org/wiki/Digital_data Digital data] | ||
Revision as of 09:13, 3 September 2015
Digital data, in information theory and information systems, are discrete, discontinuous data representating of information.
Description
Although digital representations are the subject matter of discrete mathematics, the information represented can be either discrete, such as numbers and letters, or it can be continuous, such as sounds, images, and other measurements.
The word digital comes from the same source as the words digit and digitus (the Latin word for finger), as fingers are often used for discrete counting. Mathematician George Stibitz of Bell Telephone Laboratories used the word digital in reference to the fast electric pulses emitted by a device designed to aim and fire anti-aircraft guns in 1942.
The term is most commonly used in computing and electronics, especially where real-world information is converted to binary numeric form as in digital audio and digital photography.
Analog signals
By contrast, analog signals behave in a continuous manner, or represent information using a continuous function.
TO DO: summarize.
See also
- Computation
- Computer
- Computing
- Data (computing)
- Information
- Information theory
- Information system
- Metadata
- Timestamp
