1. Information representation

Data Representation

Binary prefixes

Number systems

Binary arithmetic

Uses of number systems

Character encoding

Multimedia

Bitmap images

Vector graphics

Sound representation

Compression

Compression

Compression techniques

2. Communication

Networks & the Internet

Network types

Network models

Network topologies

Cloud computing

Transmission media

Network hardware

Ethernet

Bit streaming

The Internet

IP addressing

Locating resources on the World Wide Web

3. Hardware

Computers & Components

System components

Embedded systems

Hardware devices

Memory types

Monitoring & control

Logic Gates & Logic Circuits

Logic gates

Logic construction

4. Processor Fundamentals

Central Processing Unit (CPU) Architecture

System architecture

Components of the CPU

System performance

Ports & interfaces

Fetch-Execute Cycle

Interrupts

Assembly Language

Assembly language basics

Assembly process

Instruction groups

Addressing modes

Bit Manipulation

Bitwise operations

5. System Software

Operating Systems

Operating System fundamentals

Utility software

Program libraries

Language Translators

Translator types

Development tools

6. Security, Privacy & Data Integrity

Data Security

Security measures

Threats

Data protection

Data Integrity

Integrity methods

7. Ethics & Ownership

Ethics & Ownership

Professional ethics

Legal frameworks

Artificial intelligence (AI)

8. Databases

Database Concepts

Database models

Database design

Database normalisation

Database Management Systems (DBMS)

DBMS features

Data Definition Language (DDL) & Data Manipulation Language (DML)

SQL usage

9. Algorithm Design & Problem-solving

Computational Thinking Skills

Computational Thinking Skills

Algorithms

Algorithm basics

Pseudocode

Translation skills

Refinement & logic

10. Data Types & Structures

Data Types & Records

Data types

Record structures

Arrays

Array basics

Array pseudocode

Files

File handling

Introduction to Abstract Data Types (ADT)

ADT overview

11. Programming

Programming Basics

Pseudocode basics

Constructs

Selection

Iteration

Structured Programming

Procedures & functions

12. Software Development

Program Development Life cycle

Development models

Program Design

Structure charts

Program Testing & Maintenance

Faults & errors

Testing methods

Maintenance

Exam boards

• OCR AS Computer Science

Study tools

• Cambridge (CIE) AS Computer Science · Past Papers

Related links

• AS Computer Science · Revision Notes
• AS Computer Science · Past Papers