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[′dad·ə, ′dād·ə, or ′däd·ə]
(computer science)
General term for numbers, letters, symbols, and analog quantities that serve as input for computer processing.
Any representations of characters or analog quantities to which meaning, if not information, may be assigned.
(science and technology)
Numerical or qualitative values derived from scientific experiments.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


(data, data processing, jargon)
/day't*/ (Or "raw data") Numbers, characters, images, or other method of recording, in a form which can be assessed by a human or (especially) input into a computer, stored and processed there, or transmitted on some digital channel. Computers nearly always represent data in binary.

Data on its own has no meaning, only when interpreted by some kind of data processing system does it take on meaning and become information.

For example, the binary data 01110101 might represent the integer 117 or the ASCII lower case U character or the blue component of a pixel in some video. Which of these it represents is determined by the way it is processed (added, printed, displayed, etc.). Even these numbers, characters or pixels however are still not really information until their context is known, e.g. my bank balance is ?117, there are two Us in "vacuum", you have blue eyes.
This article is provided by FOLDOC - Free Online Dictionary of Computing (


(1) Technically, raw facts and figures, such as orders and payments, which are processed into information, such as balance due and quantity on hand. However, in common usage, the terms "data" and "information" are used synonymously. In addition, the term data is really the plural of "datum," which is one item of data. But datum is rarely used, and data is used as both singular and plural in practice.

The amount of data versus information kept in the computer is a tradeoff. Data can be processed into different forms of information, but it takes time to sort and sum transactions. Up-to-date information can provide instant answers.

A common misconception is that software is also data. Software is executed, or run, by the computer. Data are "processed." Thus, software causes the computer to process data.

(2) Any form of information whether on paper or in electronic form. Data may refer to any electronic file no matter what the format: database data, text, images, audio and video. Everything read and written by the computer can be considered data except for instructions in a program that are executed (software).

(3) May refer only to data stored in a database in contrast with text in a word processing document.
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References in periodicals archive ?
The spec line in the graph shows the grms value limit for the normal data and this can be used for the diagnosis of the normal and the abnormal data.
Figure 5 shows that as the [Th.sub.d] increases, accuracy increases in all cases and when a detection threshold value reaches 1.4, accuracy begins to decrease when for detection normal data sets obtained with [Th.sub.c] [greater than or equal to] 3 are used.
When the sliding window procedure determines that the suspicious sample is normal data, it indicates that the environment is slowly changing.
Caption: Figure 4: Examples of gaze data and corresponding GaDe images, where the first two columns represent normal data with small deviation and large deviation and the third, fourth, and fifth columns represent data of recessive strabismus, intermittent strabismus, and manifest strabismus, respectively.
On the other hand, due to the very low false alarm rate, we should simulate the normal data flow more comprehensively, which is what we need to improve in the future.
(D) [GAMMA]'(0): If [x.sub.t] is normal data, then [GAMMA]'(0) calculated by Equation 19; otherwise, it calculated by Equation (32).
Typically, the entire run is deleted, and normal data from the other parameters is rejected as well.
If [[bar.x].sub.normal] > 0, the normal data where [x.sub.i] >0 has positive contribution value for HCC image classification.
When the sliding window continues to slide, in the first column of abnormal data into the sliding window and the last column of normal data away from the sliding window, the MME value changes the most.
When things are at the scale of the web, normal data analysis will probably not work and it has to be taken up a notch with more powerful tools.