🛠️ Invention or technique

Universal Decimal Classification

Clasificación Decimal Universal

Date
1895 · confidence medium
Place
Brussels, Belgium
Credited to
Paul Otlet and Henri La Fontaine
Field
Communication

What it is

Belgian bibliographers Otlet and La Fontaine create the Universal Bibliographic Repertory in Brussels and, building on Dewey's decimal classification, develop a hierarchical decimal system to organise all human knowledge on index cards.

The system started in 1895 with the Universal Bibliographic Repertory and was published as a complete classification in successive editions up to 1905.

What it led to

  • Forerunner institution of modern documentation and information science
  • Library classification system used internationally
  • Early vision of a worldwide knowledge network (conceptual precedent of the internet)

Links

Sources✓ verified 2026-09-25