What is a vault in gymnastics?

I know that there are three different kinds of vaults, but not sure if there are anymore. There is one that's called a Horsing vault which is a rectangular, hard type of cushion that has some type of leather material on it, what you do is you run towards it then jump on a spring board and jump over the vault (there are many types of jumps). Then there is the table (vault) which looks like a table so its wider and longer (also harder to get over for more advanced gymnasts) which you can also do jumps on. The most common jump on a table is a front handspring. The most common jump for a horsing vault is a squat or a straddle. There is also the vault that compulsory level 4 and below gymnasts use. It is pretty much three 8-inchers stacked on top of each other, but a little wider and longer. The level 4s do handstand-flat backs onto them in compulsory.