Topic 1 · 4 lessons
Data representation
Binary, hexadecimal, and how text, sound, and images become numbers.
IGCSE Computer Science
Mai's Lesson
Every topic in the Cambridge IGCSE Computer Science (0478) syllabus, explained with diagrams you can click, flip, and step through. Read a lesson, play with the visual, then try the pseudocode in the editor.
Start here
New to the course? Begin with number systems. Everything in a computer is built from the binary you meet there.
Start with binaryPaper 1
Computer systems
How a computer stores, moves, and processes data, and the technology built on top of it.
Topic 2 · 3 lessons
Data transmission
Packets, cables, catching errors on the way, and keeping data secret.
Topic 3 · 4 lessons
Hardware
The CPU and its cycle, input and output devices, storage, and network hardware.
Topic 4 · 2 lessons
Software
What an operating system does, interrupts, and how code is translated.
Topic 5 · 2 lessons
The internet and its uses
How a web page reaches you, cookies, digital currency, and staying safe online.
Topic 6 · 2 lessons
Automated and emerging technologies
Sensors and actuators, robots, and artificial intelligence.
Paper 2
Algorithms, programming and logic
How to design, write, test, and reason about programs, databases, and logic circuits.
Topic 7 · 5 lessons
Algorithm design and problem-solving
Plan with flowcharts, use the standard algorithms, validate, test, and trace.
Topic 8 · 7 lessons
Programming
Variables, selection, loops, strings, subroutines, arrays, and files.
Topic 9 · 1 lesson
Databases
Tables, records, fields, primary keys, and SQL queries.
Topic 10 · 2 lessons
Boolean logic
Logic gates, truth tables, and building circuits from expressions.