This study examines data reflecting the actual impact during the first 3 years of use of the second edition of the Anglo American Cataloging Rules (AACR2) in one library, and compares them with a 5-year projection done in 1980. Findings showed the impact was close to the projection. (Author/EM)

Research conducted at Fisher Library, University of Sydney, which measured user failure to locate known items in catalog or on shelves, yielded overall failure rate of 35.9 percent (26.2 percent at catalog; 46.1 percent at shelf). User errors caused two-thirds of failures at catalog and more than half at shelf. Fifteen references are provided.…