Clydebank (SAUS)
Caillou Boats, Winchester, MA - Manufacturer code for watercraft hull identification number (USCG)
Calvi - Corsica - Airport symbol (OAG)
Clay-Mill Technical Systems, Inc. - Toronto Stock Exchange symbol
Clearly - Telegraphy (PCTE)
Clyde Surveys Ltd. - British - ICAO designator (FAAC)
Cotton Valley - Vancouver Stock Exchange symbol
County of London Yeomanry (SAUO)
Crystal Lake - New York - Seismograph station code, US Geological Survey (SEIS)
Current Law Year Book - A publication (ILCA)
Sierra Oriental Chatino - Language code (ETLW)
Worcester, MA - Location identifier - FAA (FAAL)
Yoshitomi Pharmaceutical Ind. Co. Ltd. - Japan - Research code symbol