Why four output modes as HTML, ZIP, EXE or Burn to CD?

Can you give detail descriptions and proper uses for the output modes: HTML, ZIP, EXE, and Burn to CD?

Flip Powerpoint (free download here) provides you four kinds of output modes, here is the functionality for each mode:

1. HTML: output in "HTML" way, then upload to your website, allow view online;

2. ZIP: compress all output files in a single Zip file for easily emailing or sending out;

3. EXE: pack output files into an integral execute file for instantly running;

4. Burn to CD: export flipbook directly to CD.