AC/DC converters; AC/DC power supplies; Access control and alarm monitoring systems; Accounting machines; Accumulator boxes; Accumulator jars; Accumulators and batteries; Accumulators; Acidity meters; Acidometers for batteries; Acoustic amplifiers; Acoustic amplifiers for mobile devices; Acoustic baffles sold as a component of loudspeakers; Acoustic conduits; Acoustic couplers; Acoustic membranes; Acoustic meters; Acoustic microscopes; Acoustic separation units; Acoustic sound alarms