Items
Weapons, armor, recipes and everything else: where it drops, who sells it, what makes it.
NPCs
Creatures and characters: where they live, what they drop, sell and teach.
Quests
Objectives, rewards, chains, and who gives and takes them.
Objects
Chests, ore veins, herbs and quest objects, with their loot.
Spells
Abilities, item effects and recipes, with their numbers worked out.
Type at least two letters, or an ID.