Claim: 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.
Evidence: Lonclass dates from the 1960s, whereas UDC was created from DDC in the late 19th century. Unlike UDC and DDC, which are widely used across the library community, Lonclass has remained a BBC-internal system since its creation in the 1960s. There are 300,000 subject terms in the Lonclass vocabulary.