9 Blank magnetic data carriers; coin-operated telephones; data processing computer hardware; audiological measuring apparatus and instruments, namely audiometers, test apparatus for diagnosing hearing loss and adjusting and testing hearing aids, handheld unit for adjusting hearing aids, and computer software for fitting hearing aids; measuring apparatus for telephone, data, and fiber optical communications networks, namely, fiber optic testers and fiber optic measuring equipment, namely fiber optic testers and fiber optic measuring analyzers, optical time domain reflectometer, hand-held test sets and meters, LAN/WAN/ATM/IP protocol and network analyzers, troubleshooting systems comprised of computer hardware and software used to diagnose and analyze communication equipment and networks; fiber optic telephone cables and wires; telephone apparatus, namely telephones, telephone headsets, telephone headset amplifiers, telephone equipment, namely parts and telephones and parts therefor; peripherals, namely telephone cords, telephone headset connectors, telephone on-line indicators, PBX-to-telephone interfaces and parts therefor; head sets, namely, computer headsets, telephone headsets, cordless headsets, telephone headset amplifiers, audio headsets and parts therefor; earphones