Gutenberg Galaxy

The Gutenberg Galaxy, named for Johannes Gutenberg, the inventor of printing, is the universe of all printed books ever published. The term was first used by Marshall McLuhan in his book The Gutenberg Galaxy: The Making of Typographic Man first published in 1962.

As an estimate of the size of the Gutenberg Galaxy, the British Library claims that it holds over 150 million items. The Library of Congress claims that it holds approximately 119 million items. (figures as of 2002/2003)