The Catalog is where you can buy items to customize your avatar.
You can also purchase Limiteds and Uniques, and sell or trade them later to make a profit.
Hats, Faces, Gear, Heads, Packages, and Audio can only be uploaded by Finobe staff members. Everyone can upload T-Shirts, Shirts, Pants, and Models.
Scripts and Textures also exist, but they do not have viewable categories in the Catalog. They can only be uploaded by admins.