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'''Real time''', sometimes spelled realtime,
*[https://en.wikipedia.org/wiki/1953 1953]
==Definitions==
*1: the [[actual]] [[time]] during which a [[process]] or [[event]] occurs: recent natural [[experiments]] in which creolization by children can be observed in real time | [[information]] updated in ''real time''.
•2: (as modifier real-time) Computing of or relating to a system in which input [[data]] is processed within milliseconds so that it is available virtually [[immediately]] as [[feedback]], e.g., in a missile guidance or airline booking system: real-time signal processing.
==Descriptions==
'''Real time''' within the [[media]] is a [[method]] where events are portrayed at the same rate that the [[audience]] [[experiences]] them. For example, if a movie told in real time is two hours long, then the [[plot]] of that movie covers two hours of [[fiction]]al time. If a daily real-time comic strip runs for six years, then the characters will all be six years older at the end of the strip than they were at the beginning. This [[technique]] can be enforced with varying levels of [[precision]]. In some stories every minute of screen time is a minute of fictional time. In other stories, such as the daily comic strip ''For Better or For Worse'', each day's strip does not necessarily [[correspond]] to a new day of fictional time, but each year of the strip does correspond to one year of fictional time. Real time is [[ancient]] in origin, dating back to the climactic structure of classical [https://en.wikipedia.org/wiki/Greek_drama Greek drama].
In [[computer science]], '''real-time''' computing (RTC), or reactive computing, is the [[study]] of hardware and software systems that are subject to a "real-time constraint", for example operational deadlines from [[event]] to system response. Real-time programs must guarantee response within strict time constraints, often referred to as "deadlines". Real-time responses are often [[understood]] to be in the order of milliseconds, and sometimes microseconds. Conversely, a system without real-time facilities, cannot guarantee a response within any timeframe (regardless of actual or [[expected]] response times).
[[Category: General Reference]]
A ''real-time'' system is one which "[[controls]] an environment by receiving [[data]], processing them, and returning the results sufficiently quickly to affect the environment at that time." This usage of "real-time" should not be [[confused]] with the two other legitimate uses of the term: in [[simulation]] the term means that the simulation's clock runs as fast as a real clock, while in processing and enterprise systems the term is used to mean "without perceivable [[delay]]".
''Real-time'' software may use one or more of the following: [[synchronous]] programming languages, real-time operating systems, and real-time networks, each of which provide essential frameworks on which to build a real-time software application.
A ''real-time'' system may be one where its application can be considered (within [[context]]) to be mission critical. The anti-lock brakes on a car are a simple example of a real-time computing system: the real-time constraint in this system is the [[time]] in which the brakes must be released to prevent the wheel from locking. Real-time [[computations]] can be said to have failed if they are not completed before their deadline, where their deadline is [[relative]] to an [[event]]. A real-time deadline must be met, regardless of system load.
[[Category: Theatre]]
[[Category: Computer Science]]
[[Category: Languages and Literature]]
