This book focuses on using ASCII codes for character data. As mentioned, the reason for this is that ASCII is fairly straightforward and is also compatible with the more advanced international standard, Unicode, to some degree.
H.1 Unicode
The core problem that Unicode attempts to solve is that, prior to Unicode, a whole hosts of ad hoc solutions had been implemented to add additional characters to strings, and none of them had a big picture in mind. In most of these systems, you could choose a set of characters, ...
