What does SSAA stand for? (not super-sampling)

I’m trying to find out what the Unity post processing effect called “SSAA” stands for. Can’t find any reference to it anywhere. I know it’s not “super sampling” since that’s a different AA type. Anyone know?

http://docs.unity3d.com/Manual/script-Antialiasing.html

I believe it’s simple “screen space” anti-aliasing = SSAA. (But yes, that’s confusing!)