Category sorting?

This is such a great blog! I am on the spectrum and am going to show this to all people I know who are as well. Category sorting would be great though. Do you have plans to develop this to include structured sets for people struggling to learn social skills?
I for sure would be interested in organizing things in a way that made things more accessible and useable. But I’m not sure I understand what category sorting is.
How is category sorting different from tagging? I try to tag things so that they will be findable by category. I think you mean something else, though.
Can you say more about what would be helpful? (I’d like to hear from anyone who would like to see this feature).