During the 1950s, the development of the Hungarian electrical engineering was notable. Major researches have been pursued to switch-over from analogue metrology devices to digital ones. During this period, more and more modern equipment became available to researchers and amateurs. EMG that was established during this period, contributed significantly to the discovery and dissemination of the modern technology. Beside their measuring instruments recognized on a world-wide level, they started the mass production of the first Hungarian calculator, HUNOR 131, under the direction of Árpád Klatsmányi. It had the capacity of 13 decimal digits and besides the four basic arithmetic operations, it was capable to perform exponentiation in the 60’s. The EMG produced many innovative machines over the years, for example the EMG-666 that could be programmed.