> It aimed to gather together all the world's knowledge and classify it according to a system they developed called the Universal Decimal Classification. https

> It aimed to gather together all the world's knowledge and classify it according to a system they developed called the Universal Decimal Classification. https://en.wikipedia.org/wiki/Universal_Decimal_Classification https://en.wikipedia.org/wiki/Universal_Decimal_Classificati... > UDC codes can describe any type of document or object to any desired level of detail.