Unlike DDC and UDC (created in the late 19th century), which are widely used across the library community, Lonclass (with a vocabulary of less than 300,000 subject terms) has remained a BBC-internal system since its creation in the 1960s.
Unlike DDC and UDC (created in the late 19th century), which are widely used across the library community, Lonclass (with a vocabulary of less than 300,000 subject terms) has remained a BBC-internal system since its creation in the 1960s.