Finally, the high-speed electronic computing machine differs from the desk machine only in the speed of its operations and the much higher complications of its interlockings. Thus an operation which previously took hours may be reduced to a matter of seconds.

Mass-Produced Laborers

We have so far spoken of the computing machine as an analogue to the human nervous system rather than to the whole of the human organism. Machines much more closely analogous to the human organism are well understood, and are now on the verge of being built. They will control entire industrial processes and will even make possible the factory substantially without employees.

In these the ultra-rapid digital computing machines will be supplemented by pieces of apparatus which take the readings of gauges, of thermometers, or photo-electric cells, and translate them into the digital input of computing machines. The new assemblages will also contain effectors, by which the numerical output of the central machine will be converted into the rotation of shafts, or the admission of chemicals into a tank, or the heating of a boiler, or some other process of the kind.

Furthermore, the actual performance of these effector organs as well as their desired performance will be read by suitable gauges and taken back into the machine as part of the information on which it works.

The general outline of the processes to be carried out will be determined by what computation engineers call taping, which will state and determine the sequence of the processes to be performed. The possibility of learning may be built in by allowing the taping to be re-established in a new way by the performance of the machine and the external impulses coming into it, rather than having it determined by a closed and rigid setup, to be imposed on the apparatus from the beginning.

The limitations of such a machine are simply those of an understanding of the objects to be attained, and of the potentialities of each stage of the processes by which they are to be attained, and of our power to make logically determinate combinations of those processes to achieve our ends. Roughly speaking, if we can do anything in a clear and intelligible way, we can do it by machine.

What the economic limitations will be — namely, how we may determine whether it is desirable to use the machine rather than human effectors — is something which we cannot state unambiguously until we have more experience. It is, however, quite clear that apart from the taping, which is the job for an intelligent man rather than for a deft man, the apparatus which we shall depend upon in the future machine age is largely repetitive, and will be capable of being manufactured by the methods of mass production.