¿Qué es el Unicode?

Pues el Unicode es el Standard diseñado para integrar todos los símbolos de todos los idiomas. Vamos por la versión 5.2

About the Unicode Standard
The Unicode Standard is a character coding system designed to support the worldwide interchange, processing, and display of the written texts of the diverse languages and technical disciplines of the modern world. In addition, it supports classical and historical texts of many written languages.
Formally, a version of the Unicode Standard is defined by an edition of the core specification, The Unicode Standard, together with the Code Charts, Unicode Standard Annexes and the Unicode Character Database. The detailed breakdown of the contents of each version are given on Enumerated Versions of the Unicode Standard. See also a summary of version information in About Versions.
Unicode 5.2.0
The latest version of the Unicode Standard is Version 5.2.0. This is a consolidated version of the standard, incorporating all changes into the full text. The documentation for Unicode 5.2.0 is located in:
http://www.unicode.org/versions/Unicode5.2.0/
Beta Review
Periodically, new revisions of the Unicode Character Database are available for beta review and public feedback. Consult the beta testing page to see if a beta version of the standard is available.
Maintenance
The Unicode Standard is maintained by the Unicode Technical Committee. For up-to-the minute information, please see Updates and Errata. The lists of Proposed New Characters, and Proposed New Scripts give the latest information available on pending future extensions to the character repertoire of the Unicode Standard.
More Information
Where is my Character? offers suggestions on how to find a character encoded in the Standard. There is also a Unicode Glossary and a list of Frequently Asked Questions (FAQ). The Guide to Unicode Tutorials provides a summary of useful overviews and tutorials about the Unicode Standard. That is a good place to start for general information about how the standard works. There is also a short Technical Introduction. A number of Technical Reports provide additional specifications.