Abacuses; particle accelerators; mobile phone accessories; acid hydrometers; acidimeters for batteries; acoustic couplers; couplers data processing equipment); couplings, electric; actinometers; accumulators, electric; radio frequency adaptors; telephone adapters; automobile stereo adapters; aerometers; digital organizers; electronic agendas; needles for record players; fire hose nozzles; stills for laboratory experiments; alarms; acoustic sound alarms; gas leak alarms; fire alarms; alcoholme...