This refers to a series of letters or numbers found on some locks. In the case of office furniture and some padlocks, the number is stamped or printed right on the face of the lock. Some automobile manufacturers also stamp or print this number somewhere on the vehicle. Others vehicle manufacturers keep the key code on file and can look it up for the owner by the VIN number. (NOTE: The VIN is not a key code!) With a valid key code, a well-equipped locksmith can originate a key using books or software and special key-cutting equipment. This costs more than a simple duplicate key, but can be much less expensive than a service call.