full line of scientific, electrical, photographic, optical, weighing, measuring and signaling apparatus and instruments; namely; computer hardware; potentiostats, galvanostats, voltammetric digital analyzers, frequency response detectors and spectrometers for use in scientific research, in applied scientific research, in new product development and quality control, in educational institutions and in the pharmaceutical, food and beverage, environmental, chemical and plastics industries; laboratory instruments for drug discovery and drug development, namely, meters for measuring luminescence absorbency, fluorescence and time-resolved fluorescence; electrophoresis units; chromatography test kits comprising separation columns, racks, valves, pipettes, gradient markers and spectrophotometers; electrophoresis densitometers to scan and digitize electrophoretic gels; [optical fiber splicers; conduits for receiving optical fibers; connectors and connector elements for optical fibers; ]fiber optic cables;[ fiber optic panels; fiber optic receptors; fiber optic terminals;] fiber optic viewers; imaging units, namely, fluorimeters and plate readers for use in imaging materials which produce luminescent and fluorescent signals; microscopes; fiber optic receiver modules for telecommunications equipment; semiconductor panels; x-ray security screening units, namely, x-ray imaging apparatus for use in identifying unauthorized materials at security checkpoints; metal detectors; radiation detectors; liquid and gas chromatographs; flow meters; fluid flow detectors and transducers; digital signal averagers; electric current converters; nuclear spectroscopy data acquisition units; food contamination testing instruments, namely, handheld or bench top electronic units for use by members of the food industry to test food or food preparation areas for bacteria and other contaminants; batteries; computer software in the nature of computer operating systems; computer software for managing databases containing scientific information; computer software for electrochemical measurement and analysis; computer software for scientific data acquisition, processing, storage, and analysis; computer software for chronoamperometry, chronopotentiometry and cyclic voltammetry