MULTIPLE CODING AND THE RAPID SELECTOR.

The article presents a discussion related to multiple coding. Documentary information, the record of human experience, is essentially polydimensional in character. An historical event, for example, has such dimensions as time, place, persons and organizations involved, and nature of action occurring. The record of a surgical operation is concerned with such different types of variables as the patient's symptoms, the pathological conditions thereby deduced, treatment, and the result of treatment. A chemist describes his experiments in terms of the interacting materials, the reaction conditions, the substances produced and accompanying effects, such as the evolution of heat.