Databases

* A database is a method of storing, managing and retrieving related information using tables.
* Technically a database is anything that stores information, so telephone books, filing cabinets, dictionaries, etc. are all databases.
* In business, common databases are customer lists, product information, mailing lists, etc.

http://www.asp.net/learn/sql-videos/video-103.aspx is a link to a video tutorial about databases that all who have commented on it say is a good, easy to understand tutorial for beginners.