Why is there no compiled list of the different types of search results on Google, and what the content qualifications are to generate those results?

[Draftfcb]

Seems to me that this list should exist out there somewhere, but I can't seem to find it.  Am I just not as good of a Googler as I thought I was?

[BenFox]

Do you mean the different types of vertical search options that Google has - Google scholar, Google images, Google video etc? there's a decent list here.

Or do you mean the different ways that  Google modifies universal search? 1 box, map, SPYW etc? I've not seen such a list and I think that's a great infographic idea.