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Definitions

operating system

[op-uh-rey-ting sis-tuhm] / ˈɒp ə reɪ tɪŋ ˌsɪs təm /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A software bug that was capable of crashing an operating system used by firewalls, servers and network appliances went undetected for over 27 years.

From The Wall Street Journal • Apr. 14, 2026

Then, on its own — without human guidance or help — figured out how to use that flaw to take control of any server running the operating system, using any computer, anywhere in the world.

From Los Angeles Times • Apr. 10, 2026

On the other side of the business, BlackBerry’s QNX real-time operating system for cars, robots, and other physical machinery has become the company’s core growth driver.

From Barron's • Apr. 9, 2026

But each of those bodies still needs a brain - an operating system, or software, that tells the various bits of metal what to do.

From BBC • Apr. 7, 2026

If the computer’s operating system was rewritten, computer scientists realized, the machine’s time could be shared; the computer could be trained to handle hundreds of tasks at the same time.

From "Outliers" by Malcolm Gladwell