A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
Came looking here as I'm also hearing CG and HLSL described as the same thing, but from what I've read they are related but not the same thing....
So glad I didn't buy pro. Can't even open the damn software. How is this still an issue years later!