This report describes the range of activities funded through the 20 percent set-aside and is intended to help mobilize States to share information on how to use their resources most effectively to prevent drug abuse. The inventory provides information on such topics as the range of targeted subpopulations served by State ATOD (Alcohol, Tobacco, and Other Drugs) agency prevention programs; the types of programs funded by the SAPT Block Grant set-aside in each of the six prevention strategies permitted under the Block Grant regulations; and channels of funding from the State ATOD agency to substate entities. Prevention strategies under the SAPT Block Grant are information dissemination, education, alternative activities that exclude ATOD use, problem identification and referral, community-based process, and environmental changes. The inventory notes a number of significant features of State systems and gains made in the past few years, including the installation of management information systems, the hiring of personnel trained in prevention, and the incorporation of programs tailored to the needs of targeted populations. In addition to profiling the drug prevention strategies and programs by State and the District of Columbia, this report presents an aggregate profile of programs as well as case studies. Appended glossary, a list of State documents used to compile data, a prevention study cover letter and proposed format, a list of members of the State Alcohol and Drug Abuse Agency Directions/National Prevention Network, and a SAPT Block Grant application form