A reusable mailing envelope includes a plurality of panels which, in combination, define a pocket for receipt of internal content material. The structure is formed by etching a trench into the substrate, either by removing a shallow trench isolation structure or by silicon etch at the desired location. For each fingerprint algorithm, decisions are calculated through at least one classifier corresponding to the fingerprint algorithm based on the query fingerprint and reference fingerprints, the reference fingerprints being derived from reference multimedia objects according to the same fingerprint algorithm. The neural network structure is trained with the collected information from the information processing environment to produce a model for the information processing environment.