Pulse computer

Pulse computation is a form of computation that lies between digital and
analog computation. It is any form of computation that uses aperiodic
electrical spikes (as opposed to binary peridodic voltages, like a digital
computer), to transmit information. In a pulse computer, the length of time
between each spike represents the data being transferred.

Pulse computation is primarily studied as part of the field of neural
networks. The processing unit in such a network is called a "neuron".