AFTER A BRIEF SUMMARY OF THE TEST PROGRAM (DESCRIBED MORE FULLY IN LI 000 318), THE STATISTICAL RESULTS TABULATED AS OVERALL "ABC (APPROACH BY CONCEPT)-RELEVANCE RATIOS" AND "ABC-RECALL FIGURES" ARE PRESENTED AND REVIEWED. AN ABSTRACT MODEL DEVELOPED IN ACCORDANCE WITH MAX WEBER'S "IDEALTYPUS" ("DIE OBJEKTIVITAET SOZIALWISSENSCHAFTLICHER UND SOZIALPOLITISCHER ERKENNTNIS" IN GESAMMELTE AUFSAETZE ZUR WISSENSCHAFTSLEHRE, 1922, PAGES 174, 179, 190-191, 194) IS USED IN DISCUSSING SUCH OBSERVATIONS AS THE ABSENCE OF THE DETRIMENTAL EFFECTS OF AN INVERSE RELATIONSHIP OF RELEVANCE AND RECALL UPON A SYSTEM'S EFFECTIVENESS. THE INCREASE OF RECALL IN PROPORTION TO THE NUMBER OF DOCUMENTS RETRIEVED IS ATTRIBUTED TO THE ABC-SYSTEM'S CAPABILITY OF MAKING THE USER AN INTEGRAL PART OF THE SYSTEM. FURTHER STUDY IS PLANNED OF THE FACTORS THAT CONTRIBUTE TO THE CONSISTENT AMOUNT BY WHICH THE SYSTEM ERRS. A MATHEMATICAL MODEL OF THE RESULTS DISCUSSED IN THIS DOCUMENT AND IN LI 000 318 IS GIVEN IN LI 000 234. THIS REPORT IS AVAILABLE AS AD-625-924 FROM THE CLEARINGHOUSE FOR FEDERAL SCIENTIFIC AND TECHNICAL INFORMATION, SPRINGFIELD, VIRGINIA 22151, $3.00 FOR HARD COPY, $0.65 FOR MICROFICHE, 35 PAGES. IT ALSO WAS PUBLISHED IN A SLIGHTLY EXPANDED FORM IN "AMERICAN DOCUMENTATION," VOLUME 18, NUMBER 1, PAGES 33-45, JANUARY, 1967 UNDER THE TITLE "A MULTIPLE TESTING OF THE NATURAL LANGUAGE STORAGE AND RETRIEVAL ABC METHOD--PRELIMINARY ANALYSIS OF TEST RESULTS." (AUTHOR/CM)