There's no company, it's just me :) I'll probably make a printable cheatsheet at some point, but I'm not yet sure what else to put on there.
It'd be nice if there were a bit more info on the different types (I tried clicking one of interest) - even just a link to the relevant RFC (section) would be cool.
Also you have a typo in the list (correct in the graphic) - 's/SVR/SRV/'.
Thanks! Fixed once CI is done building and deploying :)