Operating System (OS) — is software that acts as an intermediary between the user or applications and the computer's hardware. It manages the computer's resources, ensures the execution of programs, and provides the user with a convenient interface for operation.
Basics of the Operating System
The OS is the "heart" of any computer or device. Without it, any computer would be unable to run programs or interact with peripheral devices such as a keyboard, mouse, printer, or network equipment. It provides the essential services that make the computer's operation stable and efficient.
There are different types of OS:
- For personal computers: Windows, macOS, Linux.
- For mobile devices: Android, iOS.
- For servers and large systems: Unix, Linux servers, Windows Server.
- Embedded OS: used in household appliances, cars, medical equipment.
Main Functions of the Operating System
- Management of hardware resources: The OS controls the processor, memory, disks, and peripheral devices, allocating them among programs.
- Launching and executing programs: The OS ensures the launch of programs, their interaction, and safe termination.
- File management and data storage: creating, deleting, copying, and organizing files on storage media.
- Providing a user interface: graphical (GUI) or text (CLI) interface for interacting with the computer.
- Security and access: controlling user rights, protecting against unauthorized access and malware.
- Networking functions: connecting to the Internet or local networks, exchanging data between devices.
Why an Operating System is Needed
The OS makes the computer usable for people and programs. It simplifies complex technical processes, allowing the user not to think about interacting with the hardware at a low level. Thanks to the OS, we can run games, process documents, use the Internet, and work with multimedia without needing to understand the internal structure of the computer.
