Unlike UDC and DDC, which are widely used across the library community, Lonclass (with a vocabulary of 300,000 subject terms) has remained a BBC-internal system since its creation in the 1960s.
Unlike UDC and DDC, which are widely used across the library community, Lonclass (with a vocabulary of 300,000 subject terms) has remained a BBC-internal system since its creation in the 1960s.