Use VPN. Mergent Archives provides access to the D&B Industry Norms and key Business Ratios, the Corporate Manuals and the Municipal & Government Manuals. The Industry Norms & Key Business Ratios consists of U.S. corporations, partnerships and proprietorships both public and privately owned, in all size ranges, and includes over 800 different lines of business as defined by the U.S. Standard industrial Classification (SIC) code numbers. Corporate Manuals, ranging back to the early 1900s, possess a richness of corporate history and business descriptions and in-depth financial statements. Municipal & Government Manuals includes virtually all U.S. taxing jurisdictions and agencies – from school districts, hospitals, villages and towns to cities, counties and states across the nation.