CAMBRIDGE IGCSE Topic 1.1 How and why computers use binary to represent all forms of data Also in this topic... CAMBRIDGE IGCSE Topic 1.1 Number systems CAMBRIDGE IGCSE Topic 1.1 Converting between number systems, part 2 CAMBRIDGE IGCSE Topic 1.2 Representing sound CAMBRIDGE IGCSE Topic 1.3 Compression CAMBRIDGE IGCSE Topic 1.3 Lossy and lossless compression methods