CAMBRIDGE IGCSE Topic 1.2 Representing characters and character sets Also in this topic... CAMBRIDGE IGCSE Topic 1.1 Why hexadecimal is used as a beneficial method of data representation CAMBRIDGE IGCSE Topic 1.1 Signed integers using two’s complement CAMBRIDGE IGCSE Topic 1.2 Representing sound CAMBRIDGE IGCSE Topic 1.3 Calculating the size of an image and sound file CAMBRIDGE IGCSE Topic 1.3 Lossy and lossless compression methods