Mundaneum, the Index Card Internet:
When the Mundaneum opened in 1910, its purpose was to collect all of the world’s knowledge on neatly organized 3″ x 5″ index cards. The brainchild of Belgian lawyer Paul Otlet and Nobel Peace Prize winner Henri LaFontaine, the vast project eventually totaled 12 million cards, each classified according to the Universal Decimal Classification system developed by Otlet.
