Computer assisted systems, methods and mediums for filling one or more orders. The method comprises entering network user ID and password information into a central database, and registering each network application and its associated password with a LDAP server. A primary memory array is on another layer of the stack of semiconductor layers different from the layer comprising the circuit. In some embodiments, the multi-stage query processing system is capable of executing one or more passes on a user query, and using information from each pass to expand the user query for use in a subsequent pass to improve the relevancy of documents in the ordered list.