Where did you get your lists of categories?

I've been looking at the wikipedia page linked in the group description, but I notice that some other people have slightly different category headings. Where are you getting your lists? Are you using the current copyrighted version, or some other one? Are there any other useful links I should add to the group description? Etc.

I happen to have the church library's abridged DDC, ed. 12, here at home so I'm using that.