Summary
The operating system is the core software of a computer.
It helps users:
- interact with the device,
- run applications,
- manage files and memory,
- process input into output,
- keep the system working smoothly and securely.
Key terms to remember
- Operating System (OS)
- GUI
- Icon
- Menu
- Dialog box
- RAM
- Virtual memory
- Paging
- Input
- Output
- Buffer
- Spooling
- Multitasking
- Foreground
- Background
- Desktop OS
- Server OS
- Mobile OS
Revision questions
- What is an operating system?
- State three functions of an operating system.
- What is the difference between RAM and virtual memory?
- What does multitasking mean?
- Give two examples of desktop operating systems.
- What is the difference between foreground and background programs?
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