New to all of this, please forgive me!!

While I am not new to computers I am generally "Green" when it comes to the aspects of building, and using the gamecopyworld scene of computers. I see that some things aren't allowed in this type of board (Crackz, etc.) But what I want to know is exactly what are the different things? Like what is a crackz?? From what I can gather it is the code needed to burn a copy of a game, is that right?? And I take it they are on gamecopyworld. What are the other things mentioned? What are appz, warez, serial keys, ISP's, and everything else? I just want physical definitions and their uses. I tried a search to no avail, and please excuse the lameness of this question but we all have to start somewhere. Thank you for your time, all replies are appreciated.
-LuckyDog-