What does SYD stand for?

Air Yendis Ltd. - Zambia - FAA designator (FAAC)

Casper, WY - Location identifier - FAA (FAAL)

John Ray Herbarium, University of Sydney (SAUS)

Release Subject Your Discretion (FAAC)

Scheer Energy Development Corp. - Vancouver Stock Exchange symbol

Scotland Yard

See Your Doctor (SAUS)

Shipyard

South Yemen Dinar (BJA)

Sum of the Year's Digits - Statistics

Sybron Dental Specialties - NYSE symbol

Sydney - Australia - Seismograph station code, US Geological Survey - Closed (SEIS)