Os sys

What Is an Operating System?

An operating system (OS) is the core software that makes a computer usable. Without it, the hardware would simply sit idle, waiting for instructions it could never understand on its own.

As soon as the computer is powered on, the ROM (Read-Only Memory) provides the initial instructions to load the operating system. Once the OS is running, it takes full control of the system and begins managing everything:

Input and Output (I/O): The OS handles communication between the user, applications, and hardware devices such as keyboards, screens, and storage drives.

Memory Management: It allocates and frees memory so programs can run efficiently without interfering with each other.

Processes: The OS organizes and schedules all running tasks, making sure each process gets the time and resources it needs.

Resources: From CPU cycles to network bandwidth, the OS ensures fair and efficient distribution of resources.

Peripherals: It manages external devices like printers, USB drives, and cameras, translating their signals into something the computer can understand.