A communications system having a pre-defined calling group with a plurality of members is disclosed. The nanostructured grain boundary component can be insulating and magnetic, so as to provide greater continuity of magnetization of the composite material. The row of keys includes individual predefined command keys. At least some of the stacks have differing electrical power capacities, differing characteristics corresponding to the differing characteristics of the manifold zone, and corresponding differing arrangements of electrical connections and inlet and outlet ports. This enables omission of a drive device to operate the converting guide. In the final phase, the search engines rank the documents in their respective collections pursuant to the metacollection level statistics, and transmit the rankings to the metasearch engine.