@lonewolf0678 different file types because people have access to different tools, different knowledge, different skill sets. Why aren't all tools hammers?
swf can be played in a browser
qsp played by a qsp player (link just supplied a few posts up by
@zoomg )
rags requires the rags player
t3 is tads
Go to google and type "filetype swf" in the search field (or any of the types you want to know). You'll find the answer faster and more complete than what you'll get as a quick answer in a forum. Also you'll easily find the official websites of these players.