Random Categories

I've noticed there's a whole bunch of categories such as Category:Unconverted Fomor Weapons, Category:NeedMarket for Fomor Weapons, etc, and I feel like they're unnecessary, what purpose do they serve?

The NeedMarket means the NPC resell value is missing for the item. The unconverted thing is something Pyrus is doing to combine non-fomor and fomor weapon data templates.

And I should really stop being lazy and do that. x .x Feel free to help me with that...