The emphasis of this book is on digital graphic design a field created by the development not of the computer itself but of the ‘graphical user interface’ (GUI) – the means by which users can interact with graphic symbols in screen. The Apple Macintosh in particular, by adopting a GUI in place of text-based operation, allowed the innovation of a graphical screen display to be exploited for the creation of graphical content, and thus digital graphic design was born.