7. Wikimedia Foundation, I. (2007). Logo- From wikipedia, the free encyclopedia.

Retrieved May 13, 2007 from www.en.wikipedia.org

This article taken from the free online encyclopaedia Wikipedia gives a broad definition of the word Logo and describes associated concepts like Logo Design. The page contains the definition, an overview of the subject and develops ideas such as Logo today and Logo Design.
The Logo design section introduces some important guidelines to achieve good Logo Design, these include using vectors graphics, paying attention to colours or avoiding the use of gradients.
One interesting feature of the article is the keywords as hyperlinks to other definition pages and related topics such as icon for example, and links to some popular logo examples. Wikipedia also includes a discussion page and the possibility to edit the article.
The Wikipedia definition is a good starting ground to understand the area of Logo Design and what it involves.