Logo design

Logo design is an important area of graphic design, and one of the most difficult to perfect. The logo (ideogram), is the image embodying an organization. 

A logo is a graphic mark or emblem commonly used by commercial enterprises, organizations and even individuals to aid and promote instant public recognition. Logos are either purely graphic (symbols/icons) or are composed of the name of the organization

Content resources: http://en.wikipedia.org/wiki/Logo
Image resources : http://www.reandel.com/logos.html