You can find it at the top of the page near the life preserver. Besides reading the list of acronyms (actually two lists...they are split up, a-m and n-z.) you should read the entire self help center, as there is a lot of good info for newbies. It is also a good idea to read back on this board as many of the same questions come up over and over.

Another good source for the acronyms and definitions is urbandictionary.