A system intended for the analysis, processing, and storage of pulse- height and time data originating from chemically prepared samples is described. This system can record the pulse height and time of an event received from one to six detectors. Included is a device to assist in the reading and evaluation of the recorded data. The system is such that input signals are coded, mixed in a passive network, and fed to a common pulse analyzer of the height-totime- converter type. The output of the pulse-height analyzer is arranged to provide immediate visual indication on a ten-by-ten register matrix, and permanent storage on a paper tape that has been previously identified by the originating input signal. Each entry on the paper tape includes the time of entry. (auth)