Which program use as 1 , as 2 and as 3? flash 8 uses which type of as?

as refers to actionscript
which program use as 1 , as 2 and as 3?

flash 8 uses which type of as?
flash mx 2004 uses which type of as?
flash 5 uses which type of as ?

sorry, I’m newbie in this as thingy

I heard that adobe macromedia flash cs3 is the latest
and uses actionscript v3

is it possible for flash 8 to use ActionScript v3?