nting presses and augmented by the development of microfiche and microfilm which permit the storage of printed materials in a minimal amount of space.
If the printed word made possible by the invention of the printing press marked a dramatic move forward in the history of communications, which was created in 1454, other inventions have also enhanced man's communicative capacity. Pascal's 1642 calculating machine, Le Blon's color printer in 1719, lithography processes created in 1796, Morse code and the telegraph in 1838, the teletype printer in 1850, the typewriter in 18
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