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 or are composed of the name of the organization.
In the days of hot metal typesetting, a logo type was a uniquely set and arranged typeface or colophon. At the level of mass communication and in common usage a company's logo is today often synonymous with its trademark or brand.
Article Source: http://en.wikipedia.org/wiki/Logo
