The Columbia Encyclopedia, Sixth Edition. Columbia Encyclopedia World Factbook Columbia Gazetteer American Heritage Coll.
Advertising makes wide use of posters, as do charitable and political organizations.
In ancient civilizations a simple form of written public announcement was used. The invention of printing and particularly the development of the lithographic process were of paramount importance to poster art. The advertising poster originated in the 1870s. The art of poster design requires, above all, a very clear expression of the idea or product being advanced. It must be visible at a distance and comprehended in one glance, so that lines are generally simple and colors few and bold.