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Statistical classification of activities of molecules is a com puter implemented methodology of QSAR employing visu alization of molecular features and Statistical techniques for correlating features of molecules with their observed bio logical properties. Each molecule is described by noting the presence (1) or absence (0) of a feature of interest. The identification of specific features coded by 1's or 0's is accomplished by recursive partitioning. The data Sets are planned or unplanned. The method is also applicable to classification of individuals in biological populations on the basis of their genetic makeup.