An apparatus for holding at least one of a pen and a business card. Another semiconductor layer is grown on the first semiconductor layer between the dielectric strips to provide alternating dielectric sections and semiconductor sections. Related devices are also discussed. 0 as an interposition between a reference conductor and a radiation conductor; and thereby, the antenna reduces reflections of signals, and achieves a wider bandwidth as well as a sufficient gain with a lowered standing wave ratio. In some embodiments the service agents are humans, whereas other embodiments have non-human service agents in addition to or in place of human service agents.