- Rooms = memory space for programs
- Reception = user interface
- Staff = services and drivers
- Rules = security and permissions
Start here 🖥️
What is an Operating System (OS)?
An OS is the “big helper” that makes a computer usable. It manages hardware, runs programs, and gives you a user interface.
Layered diagram (required)
User
Operating System
Hardware
| 😊 User | You click, type, and open apps. |
| 🖥️ Operating System | Runs apps, manages files, drivers, network, and security. |
| ⚡ Hardware | CPU, memory, disk, keyboard, screen, Wi-Fi. |
The OS sits between you and the hardware.
Core OS functions (simple list)
- Process management: runs many programs
- Memory management: gives RAM to programs safely
- File systems: stores files in folders
- Device drivers: talks to keyboard, disk, Wi-Fi
- User interface: windows, icons, terminal
- Security: permissions and isolation