The Polish Poster is an original school, which goes from the mid-1950's to the early 1980's. There are two things that sets this school apart: search for freedom and originality. Polish artists try to create outside the box of Socialist Realism. In doing so they come up with a specific code-system, which is unique, and at the same time, universal. Two of the main underlying styles are a kind of Polish Surrealism and Polish Pop art.
By the way, this is a great page for Polish Poster History!