[en] A state of the art data acquisition system, based on the general purpose low cost microcomputer Apple II, has been designed and constructed. The system accumulates two simultaneous spectra to allow the use of a double ended transducer system. The computer can be used to display and manipulate spectra without interfering with the data accumulation. The use of direct memory access technic (DMA) greatly increases the capability of a small microcomputer and allows for higher channel advance rates than previously possible. The system has been in operation since December 1982, during which time more than 500 measurements has been performed without problems. (author)