Universal Decimal Classification Link

The UDC divides all human knowledge into ten main "houses" (classes), numbered 0 to 9:

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

Able to cover every field of knowledge, from Philosophy to Engineering. The UDC divides all human knowledge into ten

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

Using symbols like colons (:) or pluses (+) to show how different subjects—like Physics and Medicine —linked together to form new ideas like Biophysics . The System: A Mathematical Map of Mind