Is IMAC contests run by a different organization than pattern flying contests and TOC?

Or are they different styles of flying? Different planes?

Do pilots crossover from one style/plane/organization to another?

Is there a plane that can fly competitively in IMAC, Pattern, TOC and 3d?

I know(?) Imac is scale planes. It seems that the TOC is also. But pattern are unique pattern planes. Do they have the same or similar sequences?

How do pattern planes differ in flying capabilities from Imac scale planes?

And where the heck does 3d fit in? How about fun fly?

How about the phrase "precision flying" or "precision aerobatics"? Who does that?


???
Balin