Yes Griffothefog, it's a bit confusing indeed...."SA" is from "Sud Aviation" wich became "Aérospatiale" in the late 70's and "SA" turned into a "AS"
The SA365 is an upgraded twin engine version of the single engine SA 360 dating from eary 70's.
When in 1978 "Sud-Aviation" became "Aérospatiale" developments of the SA 365 were called AS365.....
Since 92, it's "EC" (Eurocopter)