Glueck describes Marinetti's expression of Simultaneity (perceptual registration of many things happening at once) in poetry that he called parole in liberta or words in freedom. "He combined onomatopoetic word fragments, numbers, symbols and typographical effects in a format that stormed the viewer's eye, making poetry a visual rather than an auditory experience...These words in freedom compositions obviously played a role in the developement of concrete and other visual poetry of la -- Source of annotation: Marvin or Ruth Sackner.