What does LUK stand for?

Cincinnati, OH - Location identifier - FAA (FAAL)

Leucadia National - NYSE symbol

Leucadia National Corp. - NYSE symbol (SPSG)

Look - Telegraphy (PCTE)

Lunanakha - Language code (ETLW)

Owen B. Luke, Cape Elizabeth, ME - Manufacturer code for watercraft hull identification number (USCG)