CAMBRIDGE IGCSE Topic 1.1 Signed integers using two’s complement Also in this topic... CAMBRIDGE IGCSE Topic 1.1 Number systems CAMBRIDGE IGCSE Topic 1.2 Representing characters and character sets CAMBRIDGE IGCSE Topic 1.3 Units of data storage CAMBRIDGE IGCSE Topic 1.3 Compression CAMBRIDGE IGCSE Topic 1.3 Lossy and lossless compression methods