[smosher]

This reminded me of just how nice the Doom WAD format is: http://doomwiki.org/wiki/WAD

When a friend complained that he had a hard time figuring out which maps were present in a given WAD, I enjoyed myself while writing a utility to organize them into directories with map numbers. I kept thinking: this is how you serialize data. Looking back on the code now, it's still easy to understand.