Paper is found all across the facility, and is supposed to be a stand-in for unreadable Documents completely inaccessible to the player. The paper texture is also used for the world model of the documents themselves. They are found in places like on desks, tables, cabinets, but most prominently on Shelves.
The document handed ot the player in the intro is just a piece of paper. This may be a joke on behalf of the developers and Agent Ulgrin.