SU

SU, Su, su, εὖ, 苏, す, or ス may refer to:
Geography

Su, Cambodia, a village in Laming, Cambodia
Su, Iran, a village in Kurdistan Province, Iran
Jiangsu (Sū, 苏), province of the People's Republic of China
Soviet Union (former ISO country code)
Subotica, a city in Serbia (license plate code)

Computing

.su, country code top-level domain for the Soviet Union
su (Unix), the substitute user command
Seismic Unix, a collection of seismic data processing tools
SuperUser, a privileged computer user account

Units

Statistical Unit
Subscriber unit

Aviation

Aeroflot, a Russian airline (IATA code)
Sukhoi, a Russian aircraft company
Vought SU, a US Navy Scout aircraft

Automotive

SU carburetors (Skinners Union)
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