Amplifiers for wireless communications; Cable television converters; Cables for optical signal transmission; Calibration blocks for calibrating ultrasonic testers, optical emission spectrometers; Electronic and optical communications instruments and components, namely, communication link testers for testing communication links; Electronic testing equipment, namely, telecommunication line integrity testing apparatus; Fiber optic connectors; Fiber optic instruments, namely, optical fiber splicer, used for optical fiber splicing; Fiber optics; Integrated circuits and integrated circuit cores for use in wireless communications and wireless communication equipment and apparati and digital signal processors (DSP); Maintenance kits for scanners comprised primarily of sets of replacement parts for scanners, namely, pick rollers, separation rollers, brake rollers and pad assemblies and also including cleaning kits for scanners comprised of liquid cleaners, cleaning sheets, cleaning papers, cleaning wipes, cleaning cloths and cleaning swabs; Optical fiber cables; Optical fibers sold as a component of fiber optical cables; Optical reflectors; Photo electron spectroscopy analyzers, not for medical purposes; Precision instruments for manipulation and positioning of microscopic objects; Protective sheaths for fiber optical cables; Radio-frequency power meters