Data (computer science): Difference between revisions

Revision as of 04:13, 24 May 2025

Revision as of 04:27, 24 May 2025

Line 5:

[[File:Data types - en.svg|thumb|Various types of data which can be visualized through a computer device.]]

''In [[computer science]], '''data''' (treated as singular, plural, or as a [[mass noun]]) is any sequence of one or more [[symbol]]s; '''datum''' is a single symbol of data. Data requires [[Interpretation (logic)|interpretation]] to become [[information]]. [[Digital data]] is data that is represented using the [[binary number]] system of ones (1) and zeros (0), instead of [[analogAnalog signature signalanalysis|analog]] representation. In modern (post-1960) computer systems, all data is digital.''

Data exists in three states: [[data at rest]], [[data in transit]] and [[data in use]]. Data within a computer, in most cases, [[Parallel communication|moves as parallel data]]. Data moving to or from a computer, in most cases, [[Serial communication|moves as serial data]]. Data sourced from an analog device, such as a temperature sensor, may be converted to digital using an [[analog-to-digital converter]]. Data representing [[Quantity|quantities]], characters, or symbols on which operations are performed by a [[computer]] are [[Data storage|stored]] and [[Record (computer science)|recorded]] on [[magnetic tape data storage|magnetic]], [[optical storage|optical]], electronic, or mechanical recording media, and [[Data communication|transmitted]] in the form of digital electrical or optical signals.<ref>{{cite web|url=https://www.lexico.com/en/definition/data|title=Data|work=Lexico|access-date=14 January 2022|url-status=dead|archive-url=https://web.archive.org/web/20190623094330/https://www.lexico.com/en/definition/data |archive-date=2019-06-23 }}</ref> Data pass in and out of computers via [[peripheral|peripheral devices]].