What does EUK stand for?

Ecoropa UK - An association (EAIO)

Eureka Driftboat, Eureka, CA - Manufacturer code for watercraft hull identification number (USCG)

Eureka Resources, Inc. - Vancouver Stock Exchange symbol

Euskaro - NCIC firearms make code (NCIC)

Library Technician Program, Kelsey Institute - EDUCATSS - UTLAS symbol