1. How many different associations and federations are there in clay shooting ?
2. and what are there purposes in the sport ?
3. what is the difference between Sporting and trap ?
Maybe these are very silly questions ?
To answer your question. I think the SCTA mentioned previously, is the Scottish Clay Target Association..might be wrong.
In England, the general governing body is called the Clay Pigeon Shooting Association or CPSA.
There are others, but that is for more specific things.
As for what they do, see above for pretty accurate description.
Sporting Clays, also known as English Sporting, are courses set out with multiple shooting positions, at each of which you would usually shoot at two different types of target, that would normally represent the flight of birds.
Trap shooting, comes in several varieties two of which you would have seen on the Olympics. With all Trap disciplines, a squad of shooters will take turns shooting at targets that are projected from a short distance in front if them, travelling away from them...very fast.
Try Googling Trap Shooting.
There is also Skeet Shooting, which has several varieties, all based around two traps, and a series of shooting positions laid out in a semi circle between them. You may have seen this at the Olympics too.
The main obvious difference between sporting, and other varieties is that with sporting, the shooting positions are usually spread out, perhaps in woodland etc and there is no set sequence of targets. With the other disceplines, shooting positions are usually small in number and close together in a line, with a strict set of targets which are set to certain rules.
Another version of sporting, is known as FITASC.
So...are you new to shooting or just curious?