An operating system (OS) is system software that manages a computer's hardware and software resources and provides common services for computer programs. It acts as an intermediary between users and the computer hardware, enabling user interaction and application functionality.
Examples of operating systems include:
1. **Windows** (e.g., Windows 10, Windows 11)
2. **macOS** (e.g., macOS Ventura, macOS Monterey)
3. **Linux** (e.g., Ubuntu, Fedora, Debian)
4. **Android** (for mobile devices)
5. **iOS** (for Apple mobile devices)
Each OS has its own features and interfaces, tailored to different types of hardware and user needs.