This free book is an excellent tutorial book for beginners. It is a collection of notes and sample codes written by the author while he was learning Unicode. Topics include ASCII, character set, encoding, GB, GB18030, GB2312, GBK, ISO-8859, JDK, JIS, UTF8, Unicode Key sections: Character Sets and Encodings - GB2312/GB18030 Character Set and Encodings - JIS X0208 Character Set and Encodings - Unicode Character Set - Unicode Transformation Formats (UTF) - JDK - Character Set and Encoding - JDK - Encoding Maps, Counts and Conversion.