Editing SSO (section)

==Science and technology==

===Spaceflight===
*[[Scaled Composites SpaceShipOne]], the vehicle used in the first privately funded human spaceflight
*[[Semi-synchronous orbit]], a type of orbit
*[[Single-stage-to-orbit]], a reusable vehicle that reaches space without jettisoning hardware
*[[Space Shuttle Orbiter]], a reusable space vehicle formerly operated by NASA
*[[Sun-synchronous orbit]], a type of orbit
*[[Swiss Space Office]], national space program of Switzerland

===Computing===
*[[Single sign-on]], allowing access to multiple software systems using one login
*[[Structure, sequence and organization]], a US legal term relating to computer programs and copyright
*[[Small string optimization]]

===Electronics===
*Simultaneous switching output, also known as simultaneous switching noise (SSN), or [[ground bounce]]

===Astronomy===
*[[Siding Spring Observatory]], an astronomical observatory in Australia
* Solar System Object