Stuffcode magic items were started by Devo, founder of Stuff, Inc. They are inspired by the magic items found in the roguelike game nethack.
Stuffcode consists of 6 major categories of objects:

Stuffcode items appear randomly in rooms and on monsters throughout the mud. At one time they were also available for sale in certain stores but now are only found in shops if a player sells them there.

Stuffcode is designed to reward players who explore and experiment, collect items obsessively, and cooperate and share with other players. Things that may not seem useful on first glance may actually be extremely powerful for those who think creatively. All Stuff is limited and will dest (disappear without notice) if a player goes idle, or leaves it in a container, a shop, or the ground for an extended amount of time.

Stuffcode items start off with mysterious descriptions until they are identified. They can be identified either by using them, at an oracle, or by reading a Stuff scroll of identify. Identifying things at an oracle is the most expensive, but also the safest and least wasteful. Oracles will allow you to identify items to 3 degrees:

All Stuffcode items have 3 potential states:

The mysterious, unidentified descriptions of Stuff items remain constant only until the next shutdown, at which point they are randomized again. Also, once your character has identified a type of item, you will recognize that item by its true name until the next shutdown, even if you log out, unless you read a cursed scroll of identify or a scroll of amnesia.

Tips:

All Stuffcode responds to the pronoun 'stuff', so you can do things like:
get stuff
drop all stuff
put stuff 2 in pack
get all stuff from pack
etc...

Since using Stuffcode generally involves collecting massive amounts of it, you will want to use contacts to keep track of it easily. You can buy contacts for free at any vending machine. When wearing contacts, a vast array of powerful viewing tools become available to you.

I recommend the following commands:
alias li l -I stuff
alias si i -I stuff

Then try:

When collecting stuff, try to branch outside of your regular xp routes. Kill as many small things as you can quickly. Any monster might be holding stuff so the more you kill and the more different rooms you visit the better your chances of finding more stuff.