1. A computing system comprising, in combination, a source of input data comprising k-bit binary message words, a message memory for storing said input data and additional k-bit binary message words, a classifier memory for storing a plurality of classifiers, each of said classifiers being composed of a condition part, an action part, and a strength value, said condition part comprising one or more k-position ternary words each of which specifies a subset of the possible k-bit binary message words, and said action part comprising at least one k-position ternary word which at least partially specifies the content of a new message word, matching means for comparing each message word in said message memory with the condition part of each classifier in said classifier memory, means responsive to said matching means for generating new message word whenever each of the ternary words in the condition part of a classifier is satisfied by at least one message in said message memory, and means for increasing the strength value associated with a particular classifier whenever said particular classifier generates a new message word to which a further classifier responds by generating a message word.