A tool employs Raman spectroscopy, optical imaging, physical measurements, smart software applications, and custom databases for automated on-site gem and mineral identification, measurement, and authenticity verification. The telephony switch or processor executing the router is connected to a local area network that also interconnects computer workstations proximate to telephones connected to the telephony switch. The second semiconductor region is provided on the semiconductor pillar of the second conductivity type. Various control strategies can be deployed to achieve aesthetically interesting light presentations which enhance ambiance within the passenger compartment. Information-flow metadata is treated as a first-class entity, and information flow is correctly tracked on the metadata itself.