What Is a Computer?
A computer is an electronic device that takes input, processes data using instructions and produces output, storing information along the way.
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A computer is an electronic device that takes input, processes data using instructions and produces output, storing information along the way.
- Input, process, output, storage
- Hardware is the physical parts
- Software is the programs
🧠 Quick quiz
Three questions. Score 2 or more to complete the topic.
What is What Is a Computer??
Within Computer Science, which covers algorithms, programming, data, networks, hardware and safe, responsible use of technology, this topic explains What Is a Computer?. Computing topics explain how software, hardware and data work, with diagrams and models that show each step in order.
Check that you can explain What Is a Computer? in your own words and give one example from everyday life. If you can do that, you have understood the core idea.
Understanding What Is a Computer? helps you design, test and explain programs, websites and systems, from small projects to exam questions.
What Is a Computer? in detail
A computer is an electronic device that accepts input, processes data according to stored instructions and produces output, and it can store information for later use. This input-process-output-storage cycle describes everything from smartphones and laptops to games consoles and the computers inside cars.
Computers have hardware (the physical parts, such as the processor, memory and screen) and software (the programs that tell the hardware what to do). They are fast, accurate and can repeat tasks without tiredness, but they follow instructions exactly and cannot think for themselves. Understanding this basic model makes every other computing topic easier.
How the interactive helps you understand What Is a Computer?
Click a step, or use the Previous and Next buttons, to move through the sequence one stage at a time. Auto-play moves on for you.
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 What Is a Computer?.
Real-life uses and examples
- Explain What Is a Computer? to someone new to computing by comparing it to a familiar process.
- Trace through a process that uses What Is a Computer? to check what it does step by step.
- Recognise What Is a Computer? in an app or device you use every day.
Common mistakes to avoid
- Using the term without being able to say what the computer actually does.
- Testing only the normal case and forgetting the edge cases.
- Learning the definition without testing it. Use the quiz and the interactive to check that you can apply the idea.
Frequently asked questions about What Is a Computer?
What is What Is a Computer??
A computer is an electronic device that takes input, processes data using instructions and produces output, storing information along the way.
What are the most important points about What Is a Computer??
The main points are: Input, process, output, storage; Hardware is the physical parts; Software is the programs.
Why is What Is a Computer? useful?
Understanding What Is a Computer? helps you design, test and explain programs, websites and systems, from small projects to exam questions.
How can I practise What Is a Computer??
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 What Is a Computer??
Related topics in Computer Science include The Fetch-Decode-Execute Cycle, Operating Systems, Converting Binary and Decimal.