These are categories of information that will be released. The categories will prove necessary to keep track of extremely voluminous information and to publish it in a searchable fashion on the derivative websites. Also it's sort of Q's committment to us (and to /badguys/ as to exactly what's coming).
IMO
I play grammarnazi if a meme is really good except for some misspelling or grammatic error that makes it look retarded. If with a small correction it can be made to really shine. I like to see top-notch material come out of our team, and consider it a team effort at times.