a device incorporated in the exhaust system of a motor vehicle, containing a catalyst for converting pollutant gases into less harmful ones
a device for converting analog signals to digital form
an electronic device for converting digital signals to analog form
a device that converts a signal to a lower frequency, especially in television reception
a steel-making process, now largely superseded, in which carbon, silicon, and other impurities are removed from molten pig iron by oxidation in a blast of air in a special tilting retort (a Bessemer converter)
a steel-making process, now largely superseded, in which carbon, silicon, and other impurities are removed from molten pig iron by oxidation in a blast of air in a special tilting retort (a Bessemer converter)