abacuses; abdominal belts containing built-in speakers for purposes of transmitting music/sounds/educational material to a fetus and built-in pockets in which to carry audio transmitters; acceleration sensors; accelerometers; access control and alarm monitoring systems; accessories for lighting fixtures, namely, plastic pole with electrical source in protective cover; accounting machines; accounting software for use in the construction industry for contract bidding and job accounting; accumulator boxes; accumulator jars; accumulators; accumulators and batteries; accumulators, electric; accumulators, electric, for vehicles; acetylene regulators; acid hydrometers; acidimeters for batteries; acidity analysers; acoustic amplifiers; acoustic amplifiers for mobile devices; acoustic baffles sold as a component of loudspeakers; acoustic conduits; acoustic couplers; acoustic coupling devices; acoustic membranes; screen protectors comprised of acrylic, tempered glass, plastic adapted for use with portable electronic devices; a mesh network of temperature probes which measures the internal temperatures of compost piles and wirelessly transmits the temperature data to a computer; welding helmets; voltage, amperage, telephone lines, and continuity testers; radio, telephone transmitters