S0
# S0

S0 may refer to:

* S0 Truss, an element of the International Space Station
* $S^0,$ elemental sulfur
* IATA airline designator for Aerolíneas Sosa
   * Previously, IATA airline designator for Slok Air Gambia (disestablished)
* the representation of the number 1 in Peano arithmetic
* ACPI S0 power state in computing
* S0 galaxy, an astronomical code for barless lenticular galaxy
* S0, part of the name of certain stars within one arc-second of Sagittarius A*
* S0 (DIN 43864), an output from electricity meters that give pulses proportional to the amount of consumed energy
* the S0 interface bus used in ISDN BRI in telephony
