[en] This paper describes a very fast, high density, time and pulse height digitizer using a novel zero suppressing technique which significantly reduces the amount of data produced by the detectors requiring a long memory time. The above described pulse shape digitizer does not have the accuracy of CCDs or the SLAC Microstore Analog Memory Unit. It is designed for experiments with a large number of channels and significantly outperforms other designs on the grounds of memory time and sampling rate. It has now passed systematic laboratory tests and it will be evaluated on the prototype of the OPAL central detector at CERN. The manufacturing cost should not exceed $100 per channel and its modularity should minimize the maintenance problems