25. The system of claim 18 wherein the identification tag is physically associated with the first paper document by being attached to first paper document, by being embedded in the first paper document, or being attached to an object that is attached to the first paper document.
18. A system for processing a paper document, the system comprising: a processor; and a memory coupled to the processor, the memory configured to store a plurality of code modules for execution by the processor, the plurality of code modules comprising: a code module for receiving an identification code associated with an identification tag; a code module for determining, from a first database storing information associated with a plurality of feature descriptors, electronic information to be associated with the identification code, the code module for determining comprising: a code module for obtaining an electronic representation of contents printed on a first paper document; a code module for selecting a portion of the obtained electronic representation; a code module for locating one or more zones on the selected portion; a code module for determining a first feature descriptor based upon at least one zone of the one or more zones on the selected portion, the first feature descriptor being distinct from the identification code; a code module for determining a matching feature descriptor from the first database that matches the first feature descriptor; and a code module for determining, from the first database, electronic document information associated with the matching feature descriptor; and a code module for storing the identification code and the electronic document information associated with the matching feature descriptor in the memory, whereby the electronic document information associated with the matching feature descriptor is associated with the identification code and is determinable using the identification code.