The HAPLR II Index is featured in the September 1999 issue of American Libraries magazine.  The Index uses data provided by nearly 9,000 public libraries in the United States to create comparative rankings. The comparisons are in broad population categories with breaks at 1,000; 2,500; 5,000; 10,000; 25,000; 50,000; 100,000; 250,000; and 500,000. The two distinctions between the first and second editions of the Index are the number of libraries included: 7,000 in the first edition, nearly 9,000 in the second; and the population categories used, four in the first edition, 10 in the second.  Both editions are based on the same data from the Federal-State Cooperative Service (FSCS).