1. Fundamentals of Algorithms

Representing Algorithms

Algorithms, Decomposition & Abstraction

Systematic Approach to Problem Solving

Algorithm Inputs, Processes & Outputs

Tracing Algorithms

Efficiency of Algorithms

Algorithm Efficiency

Searching Algorithms

Linear Search

Binary Search

Comparing Linear Search & Binary Search Algorithms

Sorting Algorithms

Merge Sort

Bubble Sort

Comparing Merge Sort & Bubble Sort Algorithms

2. Programming

Data Types

Data Types & Casting

Programming Concepts

Inputs & Outputs

Variables, Constants & Assignments

Basic Programming Concepts

Iteration

Introduction to Subroutines

Arithmetic, Relational & Boolean Operations

Arithmetic, Relational & Boolean Operations

Data Structures

Data Structures

Arrays

Records

String Manipulation

String Manipulation

Random Number Generation

Random Number Generation

Structured Programming

Using Subroutines

Structured Programming

Robust & Secure Programming

Data Validation

Authentication Routines

Testing Algorithms

Types of Errors

3. Fundamentals of Data Representation

Number Bases

Number Bases

Bit Patterns

Converting Between Number Bases

Converting Between Decimal & Binary

Converting Between Decimal & Hexadecimal

Converting Between Binary & Hexadecimal

Units of Information

Units of Data

Binary Addition

Binary Shifts

Representing Characters

Representing Images

Representing Sound

Compression

Compression - Huffman Coding

Compression - Run Length Encoding

4. Computer Systems

Hardware & Software

Hardware & Software

Software

The Purpose & Functionality of Operating Systems

The Purpose & Functionality of Utility Software

5. Boolean Logic

Boolean Logic

Boolean Logic Diagrams

Combining Boolean Operators

Truth Tables

6. Programming Languages & Translators

Programming Languages & Translators

Levels of Programming Langauges

Translators

7. Systems Architecture

CPU Architecture, Performance & Embedded Systems

CPU Components & Their Function

Characteristics of the CPU

Fetch-Execute Cycle

Embedded Systems

8. Memory & Storage

Memory

Different Types of Memory

RAM & ROM

Secondary Storage

The Need for Secondary Storage

Common Types of Storage

Cloud Storage

9. Fundamentals of Computer Networks

Fundamentals of Computer Networks

Types of Network

Wired & Wireless Networks

Wired & Wireless Networks 2026-exams

LAN Topologies 2026-exams

Network Protocols

Network Protocols 2026-exams

Network Security

The Concept of Layers

10. Cyber Security

Fundamentals of Cyber Security

Cyber Security & Threats

Methods of Preventing Cyber Security Threats

Methods of Preventing Cyber Security Threats

11. Relational Databases & Structured Query Language

Relational Databases

Relational Databases

Structured Query Language (SQL)

12. Ethical, Legal & Environmental Impacts of Digital Technology

Ethical, Legal & Environmental Impacts

Impacts of Digital Technology on Wider Society

Legislation in Computer Science

Exam boards

• Edexcel GCSE Computer Science
• OCR GCSE Computer Science

Study tools

• AQA GCSE Computer Science · Exam Questions
• AQA GCSE Computer Science · Past Papers

Related links

• GCSE Computer Science · Revision Notes
• GCSE Computer Science · Exam Questions
• GCSE Computer Science · Flashcards
• GCSE Computer Science · Past Papers
• GCSE Computer Science · Glossary
• AQA GCSE Computer Science · Exam specification