If ur asking what is this thing called a 'serial number,' It'sthe code that you need to enter in order for you to be able todownload aplications. This is necessery, because adobe spends a lotof money on devoloping their cs's and they need some kind of aproof that you have paid for it. The code is usually found in thepackage or in an e-mail that adobe has sent. A crack is basically afake version of that. It sometimes works, but not often.

If ur asking me to give a serial code, I won't. Pay for ur ownthings or steal, from somebody else. Adobe is very expensive.