Distinguish system and application software
Classify software by whether it provides services the computer needs or functions the user wants.
This sequence follows Cambridge IGCSE Computer Science 0478, 2026–2028 syllabus Version 6. It covers subject content sections 4.1–4.2 only. The separately published 2029–2031 syllabus is not mapped here. Practice is original, self-checked and does not award an official Cambridge grade. Full timed papers and human subject-teacher review remain outstanding.
Before you begin
- No programming language is required. Be comfortable with place value and multiplication; each lesson introduces the computer-science notation it uses.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
What is application software designed to provide?
What you will learn
- Explain system software
- Explain application software
- Classify operating systems, utilities and user applications
System software supports the computer
System software provides services required by the computer. It includes the operating system and utility software, such as backup or malware-protection tools.
Apply and check the rule
Application software provides services the user requires, such as writing documents, browsing websites or editing images. A program's category depends on its purpose; an operating system remains system software even when a user interacts with it.
Pause and explain
Which is application software?
Worked example
Classify a spreadsheet program and an operating system.
Show the worked solution
- The spreadsheet performs a user task.
- The operating system provides core computer services and a platform for applications.
- They are application software and system software respectively.
Answer Spreadsheet: application software. Operating system: system software.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Classify a utility program that checks a disk for errors.
Give me a hint
Ask whether it supports computer maintenance or a user-created task.
Compare my reasoning
- It maintains the computer system.
- Utilities are system software.
System software (a utility)
Look for these in your work
- Purpose identified
- Category correct
A school uses an operating system and a presentation editor. Classify both and explain.
Give me a hint
Use who or what each package serves.
Compare my reasoning
- The operating system manages core resources and supports applications.
- The editor helps the user create presentations.
- They are system software and application software.
The operating system is system software; the presentation editor is application software.
Look for these in your work
- OS role
- User task
- Categories applied
A student says a browser is system software because it needs the operating system to run. Explain why that reasoning is incorrect.
Give me a hint
Many application programs depend on system software.
Compare my reasoning
- The operating system provides the platform needed to run applications.
- A browser provides the user's web-browsing service.
- Dependency on system software does not change the browser's category.
A browser is application software because it performs a user task. It relies on the operating system, but that dependency does not make it system software.
Look for these in your work
- OS platform role
- Browser purpose
- Dependency distinguished from category
Common mistakes
- Calling every visible program system software
- Calling an operating system application software because users interact with it
What can you explain now?
Which category includes utility software?
Compare with the explanation
System software
Utilities provide services that help the computer operate or be maintained.
After trying it yourself, choose your next review. This is your self-assessment.
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Make it stick
What purpose distinguishes application software from system software?
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.