Which file am I supposed to download?

e I to download all the files? Or Can I have to choose only one among many? I think they are the different releases of the the same file but I'm not sure at all of this...  Could you help me?  Ihope you can reply Thank u so much,  Cristian Zap -- -

may-day\

Hi, I've surfed the Debian site and I'm very interested in getting this O.S. At the moment I have Xp installed on my PC, and to tell the truth, I don't wanna get rid of itanyway I want the Gnu/linux O.S. First of all, I'm italian, so if you think someone can give me help from Italy, I thin