SX

SX may refer to:

• An abbreviation for Supercross, a form of off-road motorcycle racing held in outdoor and indoor stadia.
• SX News, a gay and lesbian newspaper in Sydney, Australia
• Parallax SX, a range of micro-controllers made by Ubicom
• 1000BASE-SX, a fiber optic gigabit Ethernet standard
• Skybus Airlines's IATA airline code
• SX, the aircraft registration prefix for Greek aircraft
• Sx, a medical shorthand for symptoms
• Single word eXternal, in the context of 386SX and 486SX CPUs
• Sx or sx, is a digraph in the Esperanto x-system orthography, representing the consonant sound, normally spelled as Ŝ or ŝ in the Esperanto alphabet