Universal Decimal Classification May 2026

To make this work, they needed a classification system that was:

Using numbers that any person, regardless of language, could understand. universal decimal classification

The UDC divides all human knowledge into ten main "houses" (classes), numbered 0 to 9: To make this work, they needed a classification

Otlet and La Fontaine didn't just want a library; they wanted a "city of knowledge". In 1895, they founded the Mundaneum in Mons, Belgium—a pre-digital precursor to Google. To make this work

Able to cover every field of knowledge, from Philosophy to Engineering.