Scope, you're probably not looking at an Italian keyboard, which the original poster says s/he has.
On OS X you'll find the Key Caps app in Applications/Utilities. Just like on OS !X, it will give you the picture of what you can type on your keyboard--hold down the Shift, Option, or Shift+Option to see all the variants. Different fonts may offer different possibilities, use the Font menu in Key Caps to check them out.