THIS REPORT IS A BRIEF REVIEW OF RESULTS OF AN EXPERIMENT TO DETERMINE THE INFORMATION RETRIEVAL EFFICIENCY OF A MANUAL SPECIALIZED INFORMATION SYSTEM BASED ON 700,000 DOCUMENTS IN THE FIELDS OF ENDOCRINOLOGY, STRESS, MAST CELLS, AND ANAPHYLACTOID REACTIONS. THE SYSTEM RECEIVES 30,000 PUBLICATIONS ANNUALLY. DETAILED INFORMATION IS REPRESENTED BY SYMBOLIC SHORTHAND STATEMENTS THAT ARE FILED BY A RIGID ORDER-OF-PRECEDENCE SCHEMA CALLED THE SYMBOLIC SHORTHAND SYSTEM. ORIGINS OF THE SYSTEM, EXAMPLES OF CODIFICATION, SPECIMEN FORMS USED IN THE EXPERIMENT, AND A BRIEF ASSESSMENT OF FINDINGS ARE INCLUDED IN THE REPORT. THIS DOCUMENT IS AVAILABLE AS AD-659-716 FROM THE CLEARINGHOUSE FOR FEDERAL SCIENTIFIC AND TECHNICAL INFORMATION, SPRINGFIELD, VIRGINIA 22151, $3.00 FOR HARD COPY, $0.65 FOR MICROFICHE, 40 PAGES. (AUTHOR)