Real-time computing
study of hardware and software systems that have a "real-time constraint"
Real-time computing (RTC) is the computer science term for hardware and software systems subject to a "real-time constraint", for example, from event to system response. Real-time programs must guarantee response within specified time constraints, often referred to as "deadlines".
The term "real-time" is also used in simulation to mean that the simulation's clock runs at the same speed as a real clock.
Real-time responses are often understood to be in the order of milliseconds, and sometimes microseconds. A system not specified as operating in real time cannot usually guarantee a response within any timeframe, although typical or expected response times may be given. Real-time processing fails if not completed within a specified deadline relative to an event; deadlines must always be met, regardless of system load.
A real-time system has been described as one which "controls an environment by receiving data, processing them, and returning the results sufficiently quickly to affect the environment at that time". The term "real-time" is used in process control and enterprise systems to mean "without significant delay".
Real-time software may use one or more of the following: synchronous programming languages, real-time operating systems (RTOSes), and real-time networks. Each of these provides essential frameworks on which to build a real-time software application.
Begin with the source’s own compact description: “Real-time computing” is study of hardware and software systems that have a "real-time constraint". The dossier treats that line as a proposition to test through Real-time, computing and study, not as a finished interpretation.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Sep 7, 2026. The linked authority identifier is Q3988. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Real-time computing” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.