ID3 is a very popular audio file data tagging format thas is actively used by software and hardware developers around the world. ID3 tags are supported in software such as [http://itunes.com iTunes], [http://www.microsoft.com/windows/windowsmedia/ Windows Media Player], [http://winamp.com/ WinAmp], YME, [http://musicmatch.com/ MusicMatch] and hardware players like the [http://www.apple.com/ipod iPod], [http://creative.com/products/welcome.asp?category=213 Creative Zen], [http://www.toshibadirect.com/td/b2c/acat.to?seg=HHO&coid=-26604 Toshiba Gigabeat] and [http://www.sonystyle.com/is-bin/INTERSHOP.enfinity/eCS/Store/en/-/USD/SY_BrowseCatalog-Start;sid=iol0yFUOhSp0HBatp1p-wxoAGM34hD9Kq80=?CategoryName=pa_mp3players&Dept=audio Sony Walkman].
An ID3 tag is a data container within an MP3 audio file stored in a prescribed format. This data commonly contains the Artist name, Song title, Year and Genre of the current audio file. This website contains the format standards information for the ID3 tagging data container.
While there are legacy and future standards for ID3 tags, the most popular version implemented today is ID3 version 2.3. A followon version, 2.4, is documented on this website but has not achieved popular status due to some disagreements on some of the revisions and the tremendous inertia present in the software and hardware marketplace.
Consumers should read the ["Introduction"] where the basics of the ID3 tagging format and it's history are covered. On that page are links to basic technical information about how ID3 tags work.
Developers who are new to the ID3 tag format may want to jump directly to the [:ID3v2Easy: ID3v2 made easy] page for quick low tech introduction. Those interested in getting right into the thick of the standard should check out the [:DeveloperInformation: Developer Information] page.