The full form of **OS** is **Operating System**. 

### What is an Operating System?
An operating system is software that manages the hardware and software resources of a computer or device. It acts as an interface between the user and the hardware, enabling applications to function properly.

### Key Functions of an OS
- **Process Management**: Handles the execution of processes, including multitasking and scheduling.
- **Memory Management**: Allocates and deallocates memory for processes and applications.
- **File System Management**: Manages the storage, retrieval, and organization of data on disks.
- **Device Management**: Facilitates communication between hardware devices and software.
- **Security**: Provides access control and protects data and system resources.

Examples of popular operating systems include Windows, macOS, Linux, Android, and iOS.

What is the full form of OS?

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The full form of OS is Operating System. 

What is an Operating System?

An operating system is software that manages the hardware and software resources of a computer or device. It acts as an interface between the user and the hardware, enabling applications to function properly.