Amazon API for searching/displaying products?

[eluser]supermogx[/eluser]
I found this code. Seems to be up to date and it works...
http://www.arizonaseoconsultant.net/top-sellers-code/
Now I just need to find where in the world is the documentation on Amazon's website about those services. There so much acronyms like RDS, PBS, SS3, EC3... man, come on, be CLEAR! KISS!! (sorry )