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Home / Glossary / RTOS
Glossary · Device

RTOS

Real-time Operating System

In plain language

A small operating system for devices that must respond within a fixed time.

The metaphor

Like a kitchen run by a stopwatch, where each dish must be ready at exactly the right second.

Going deeper

How it works

  • It is used in devices where timing matters.
  • Cars, medical gear and industrial equipment use it.
  • It is smaller and simpler than Windows.
  • Updates are rare and need to be planned.
In practice
  • A medical pump uses one.
  • A factory controller uses it.
  • A smart camera uses one.

A question owners ask

Why does it matter?

Because devices running it are often hard to update. Ask vendors how they deliver security fixes.

Related terms
BIOSBasic Input/Output SystemCCTVClosed-circuit TelevisionCSUChannel Service UnitEndpointESNElectronic Serial NumberFirmwareFPGAField Programmable Gate ArrayGPSGlobal Positioning System

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