Which one is not operating system?

A P11
B OS/2
C Windows
D Unix

Correct Answer: P11

An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Early computers were built to perform a series of single tasks, like a calculator. Basic operating system features were developed in the 1950s, such as resident monitor functions that could automatically run different programs in succession to speed up processing.
Bissoy MCQ
#Computer Fundamentals #Operating System

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