title: Installer vs. zip or executable exe?
body: <p>In most of the games and programs you download, you just get the installer.
  Some .exe files can be ran straightly, though (it's probably cause they don't have much source files to extract, huh?).</p>
  
  <p>I was wondering, what's the difference between an installer, that just extracts the files, and a zip (rar, iso..) file, that you could download ,just depending on your internet speed, in up to few seconds. And where does a, maybe 200mb, installer fetch the, let's say 5gb of, files, offline?</p>
  
  <p>I've never heard about this, and I'm learning to program, so I'd appreciate if you could answer me properly.</p>