operating system
US /ˈɑː.pə.reɪ.t̬ɪŋ ˌsɪs.təm/
UK /ˈɑː.pə.reɪ.t̬ɪŋ ˌsɪs.təm/

1.
besturingssysteem
the software that supports a computer's basic functions, such as scheduling tasks, executing applications, and controlling peripheral devices.
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Windows is a popular operating system for personal computers.
Windows is een populair besturingssysteem voor personal computers.
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Linux is an open-source operating system.
Linux is een open-source besturingssysteem.