The top two sources provide very accessible information if you wish to delve deeper into most of the topics covered in this tutorial.

• The Unicode Consortium, The Unicode Standard, Version 4.0, ISBN 0-321-18578-1. Also available online.
• Richard Gillam, Unicode Demystified, ISBN 0-201-70052-2.
• Richard Ishida, Non-Latin Writing Systems, Characteristics & Impact on Product Design, Proceedings of the 21st International Unicode Conference, May 2002.