The 104 Federal components surveyed reported employing 137,929 LEOs as of June 30, 2006. They were authorized to perform at least one of four of the following law enforcement functions: conduct criminal investigations, execute search warrants, make arrests, or carry firearms. Seven of the 104 components accounted for 93,263 (68 percent) of all LEOs. Six of these components were within the Department of Justice or Department of Homeland Security. The 104 components reported using 211 different job series classifications or titles for their LEOs. They also reported employing 121,821 LEOs under 188 Office of Personnel Management (OPM) job series classifications and 16,108 LEOs under 23 non-OPM job series or titles. The most widely used OPM job series was the 1811 criminal investigator series. All of the components cited Federal statutes as a primary source of their authorities to perform law enforcement functions. In addition, 40 components reported Federal regulations, rules, or procedures as primary sources of authority. Federal components that employ LEOs were identified by consulting, among other sources, the Federal Citizen Information Center's Cabinet Agencies and Independent Agencies and Commissions Directory; a list of organizations included in the Federal Law Enforcement Training Center 2004-2005 List of Agencies Trained at the Center; and Federal agencies listed in Federal Law Enforcement Officers, 2002. 1 table, 2 figures, and 7 appendixes that address the survey's scope and methodology and present tables of survey information