Operating system

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. All computer programs, excluding firmware, require an operating system to function.

An operating system manages:

1. Memory
2. Processes
3. Boot-up / Shutdown process
4. Files
5. Security
6. CPU Scheduling
7. Devices, Device I/O
8. Interrupts
9. The user interface, most often a GUI but also a CLI

An operating system also provides:

1. Tools for managing the operating system. These are often called utilities or system tools. []Media:Linux observability tools.png | Click here for a brilliant graphic showing the different types of tools you can use to view inside the operating system]]

Different operating systems

1. Linux
2. OS X
3. WIndows
4. iOS
5. Android OS
6. Google chrome OS (Based on Linux)

Do you understand this topic?

• Describe the main functions of an operating system.

Do you have an advanced understanding about this topic?

• Describe how an operating system manages the functions you have just described above.

Give a detailed account or picture of a situation, event, pattern or process.