What is an operating system (OS), and what are some examples of popular OSes? An operating system (OS) is a software program that manages computer hardware and software resources and provides common services for computer programs. It acts as an interface between the user and the computer, allowing users to interact with the hardware and run software applications. An operating system performs various functions, such as managing memory and file storage, controlling hardware devices, providing security features, and supporting software applications. Some popular operating systems include: Microsoft Windows: This is the most widely used operating system for personal computers and laptops. Windows offers a user-friendly interface, support for a wide range of software applications, and features like Microsoft Office and the Windows Store. MacOS: Developed by Apple, MacOS is the operating system used on Apple's Mac computers. It offers a sleek and intuitive user interface, advanced secu...