← IGCSE Computer Science Paper 1

Classifying software as system or application

Ask who the program serves: the computer itself (OS, antivirus, backup) is system software; a task the user wants done (word processor, game) is application software. Justify with 'because'.

Part of: IGCSE Computer Science 0478 — 4.1 Types of Software and Interrupts — Module 15

Understanding Classifying software as system or application in IGCSE Computer Science Paper 1

What it does: Antivirus and backup utilities maintain and protect the computer rather than do a user task, so they count as system software. Cost does not decide the type. The core test is who or what the program serves. Exam answers should use 'because' to give a reason. Naming the type alone does not show your reasoning.

Common mistakes: Antivirus software looks after the computer itself, so it is system software, not application software. The line should be kind = "system". A word processor does a task the user wants done (writing a letter), so it is application software. The line should be kind = "application".

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This module's key terms are also in a printable crossword (Modules 356–372) and word search (Modules 356–389).

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Learning

Duo

A student wants to classify a word processor. Which answer is correct?

System software, because it is installed on the computerApplication software, because it helps the user do a task (writing documents)

Matches

Antivirus = application software because the user chooses to install it

↓

Wrong reason. Antivirus is system software because it protects and maintains the computer itself. Who installs it does not decide the type.

Applying

Meanings

Term

system vs application

Meaning

Ask who the program serves: the computer itself (OS, antivirus, backup) is system software; a task the user wants done (word processor, game) is application software. Justify with 'because'.

Practice

Operating system: system software because it runs the computer

Testing

Gaps

category ← ""

Check Answer

Spots

2serves = "computer"

3kind = "application"

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Quick Questions

1. A student wants to classify a word processor. Which answer is correct?

A. System software, because it is installed on the computer

B. Application software, because it helps the user do a task (writing documents) ✓

A word processor serves a task the user wants done. Being installed on a computer does not make software system software.

2. Which program is system software?

A. A video game, because it uses the computer's processor

B. An operating system, because it manages the computer's hardware and resources ✓

The OS serves the computer's own needs. A game serves the user's wish to play, so it is application software.

3. Which statement about an antivirus program is correct?

A. It is system software, because it protects and maintains the computer itself ✓

B. It is application software, because the user chooses to install it

Who chose to install it is not the test. Antivirus is a utility that looks after the computer, so it is system software.

4. Which is the best way to classify a program?

A. Ask whether it serves the computer's own needs or a task the user wants done ✓

B. Ask whether it is free or paid for

Cost does not decide the type. The core test is who or what the program serves.

5. Backup software copies files so they can be restored if the originals are lost. How should it be classified?

A. System software, because it is a utility that maintains the computer's data ✓

B. Application software, because it works with the user's files

Backup tools are utilities that keep the computer safe and working, so they are system software. Working with files does not make them application software.

Match the Pairs

Windows 11 (operating system) → System software, because it manages the computer's hardware and runs other programs rather than doing a user task

Microsoft Word (word processor) → Application software, because it helps the user complete a task they want done: writing and editing documents

Antivirus and backup tools look after the computer itself, so they are classified as system software → antivirus = 'system software' # because it protects the computer

A game is something the user wants to do for fun, so it is classified as application software → game = 'application software' # because it does a user task

Antivirus = application software because the user chooses to install it → Wrong reason. Antivirus is system software because it protects and maintains the computer itself. Who installs it does not decide the type.

Word processor = system software because it runs on the operating system → Wrong classification. A word processor is application software because it helps the user write documents. Running on the OS does not make it system software.

Key Term

system vs application

Ask who the program serves: the computer itself (OS, antivirus, backup) is system software; a task the user wants done (word processor, game) is application software. Justify with 'because'.

Fill in the Blanks

1. IF serves = "computer" THEN category ← "system" ENDIF

Hint: Type the software category for a program that serves the computer's own needs.

2. IF serves = "user" THEN category ← "application" ENDIF

Hint: Type the software category for a program that does a task the user wants done.

3. OUTPUT "Backup tools are system software" OUTPUT "because they protect the computer"

Hint: Type the pseudocode keyword that displays a message.

4. OUTPUT "A game is application software" OUTPUT "because the user wants to play"

Hint: Type the word used to justify a classification.

5. IF serves = "user" THEN category ← "application" ENDIF

Hint: Type the operator that compares what the program serves with a value.

Spot the Error

Question 1

A program = "antivirus"

B serves = "computer"

C kind = "application"

Line C — Antivirus software looks after the computer itself, so it is system software, not application software. The line should be kind = "system".

Question 2

A program = "word processor"

B serves = "user"

C task = "write a letter"

D kind = "system"

Line D — A word processor does a task the user wants done (writing a letter), so it is application software. The line should be kind = "application".

Question 3

A def classify(serves_computer):

B if serves_computer:

C return "system"

D return "system"

Line D — Both outcomes return "system", so a game would be classed as system software. The last line should return "application" for programs that do not serve the computer.

Question 4

A program = "backup tool"

B serves = "computer"

C if serves = "computer":

D kind = "system"

Line C — A single = assigns a value. A comparison needs ==. It should be if serves == "computer":.

Question 5

A program = "operating system"

B serves = "user"

C kind = "system"

Line B — The operating system manages the computer's own hardware and resources, so it serves the computer, not the user. The line should be serves = "computer".

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