Because it was getting amazingly complex and because I am a giant nerd, I made this diagram to show the current Star Trek category structure on Fanlore. Some of these were just added this afternoon, so they're empty at the moment.
I'm not sure I see the pattern in the Zine subcategories; is that explained or discussed somewhere?
It's discussed on the talk page of the page linked in the comment above. Basically, the TOS subcategories are based on the available information about the zines. One resource lists every K/S zine known to mankind, so we can put everything "slash" in one category. We would have liked to divide the other fiction zines by "gen" and "het" to mirror the slash subcategory, but often enough we don't have that kind of information. Usually fanfic zines were either gen or adult, meaning a zine labeled gen could be either gen or het according to our definitions today, while zines with an adult label were explicit het (or slash of any rating). However, we usually do have the information that something was a novel by X or an anthology with stories by A, B, and C, so that's where the gen/het cats come from.
no subject
It's discussed on the talk page of the page linked in the comment above. Basically, the TOS subcategories are based on the available information about the zines. One resource lists every K/S zine known to mankind, so we can put everything "slash" in one category. We would have liked to divide the other fiction zines by "gen" and "het" to mirror the slash subcategory, but often enough we don't have that kind of information. Usually fanfic zines were either gen or adult, meaning a zine labeled gen could be either gen or het according to our definitions today, while zines with an adult label were explicit het (or slash of any rating). However, we usually do have the information that something was a novel by X or an anthology with stories by A, B, and C, so that's where the gen/het cats come from.