Data representation
Number systems — binary, hex and denary — then text, sound and images, data storage and file compression.
SKT Subjects · Computer Science
IGCSE / O Level Computer Science
Cambridge IGCSE and O Level Computer Science (2210 / 0478) — ten topics across two papers, listed in teaching order. Each one gets its own page as it's taught.
Section 1 · Computer Systems
Paper 1Data transmission
Types and methods of data transmission, methods of error detection, and symmetric vs asymmetric encryption.
Hardware
Computer architecture and the fetch–execute cycle, input and output devices, data storage, and network hardware.
Software
Types of software and interrupts, then programming languages, translators and IDEs.
The internet and its uses
The internet and the World Wide Web, digital currency, and cyber security threats with their countermeasures.
Automated and emerging technologies
Automated systems built on sensors and microprocessors, robotics, and artificial intelligence.
Section 2 · Algorithms, Programming and Logic
Paper 2Algorithm design and problem solving
The program development life cycle, decomposition, standard methods of solution, validation and verification, test data, trace tables, and finding errors.
Programming
Programming concepts — sequence, selection, iteration, operators and subroutines — plus arrays and file handling.
Databases
Single-table databases: field types, primary keys, and queries written in DDL and DML.
Boolean logic
The six standard logic gates and their symbols, then logic circuits, logic expressions, truth tables and problem statements.
Topic pages go up as they're actually taught — the list above is the syllabus, not a promise.