Operating Systems
An operating system manages hardware and software, giving users an interface and running programs.
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An operating system manages hardware and software, giving users an interface and running programs.
- Examples are Windows, macOS, Linux and Android
- It manages files and memory
- It handles security and users
🧠 Quick quiz
Three questions. Score 2 or more to complete the topic.
What is Operating Systems?
Within Computer Science, which covers algorithms, programming, data, networks, hardware and safe, responsible use of technology, this topic explains Operating Systems. Computing topics explain how software, hardware and data work, with diagrams and models that show each step in order.
Check that you can explain Operating Systems in your own words and give one example from everyday life. If you can do that, you have understood the core idea.
Understanding Operating Systems helps you design, test and explain programs, websites and systems, from small projects to exam questions.
Operating Systems in detail
An operating system (OS) is the software that manages the computer's hardware and provides services for other programs. Examples are Windows, macOS, Linux, Android and iOS. Its functions include managing memory, processes and multitasking, controlling input and output devices through drivers, managing files, providing a user interface and handling security.
A graphical user interface (GUI) uses windows, icons, menus and pointers, whereas a command-line interface uses typed commands. The OS lets many programs share the CPU and memory without interfering, and users to run programs without knowing the hardware details. Updates fix bugs and security problems.
How the interactive helps you understand Operating Systems
Click a card to flip it and reveal the answer, then move on to the next one.
Before you change anything, predict the result. Then change one value at a time and check whether your prediction was right. This is a quick way to build a correct mental model of Operating Systems.
Real-life uses and examples
- Apply Operating Systems when you design a small program, website or spreadsheet.
- Explain Operating Systems to someone new to computing by comparing it to a familiar process.
- Trace through a process that uses Operating Systems to check what it does step by step.
Common mistakes to avoid
- Testing only the normal case and forgetting the edge cases.
- Using the term without being able to say what the computer actually does.
- Learning the definition without testing it. Use the quiz and the interactive to check that you can apply the idea.
Frequently asked questions about Operating Systems
What is Operating Systems?
An operating system manages hardware and software, giving users an interface and running programs.
What are the most important points about Operating Systems?
The main points are: Examples are Windows, macOS, Linux and Android; It manages files and memory; It handles security and users.
Why is Operating Systems useful?
Understanding Operating Systems helps you design, test and explain programs, websites and systems, from small projects to exam questions.
How can I practise Operating Systems?
Open the interactive at the top of this page and change the controls one at a time. Predict the result before each change, then take the three-question quiz. A score of two or more marks the topic as complete on this device.
Which topics are related to Operating Systems?
Related topics in Computer Science include Converting Binary and Decimal, Text, Images and Sound as Data, Logic Gates.