Lol, at school there is a keyboard some child fiddeld with and re arranged all the keys. No you have the keys arranged in things like: hom0 (what means gay) and vagina and d1ck.
A root is let's say the basis. Like the San Andreas installation is like the roots of a try (the folder that all spit with other files). And all of it goes to the main root what is the Root Directory. Where you installed the game (probably Program Files).