GAP Toolkit Module 1 was prepared with the support of the United Nations International Drug Control Programme under the Global Assessment Programme on Drug Abuse (GAP). The main objective of GAP is to assist countries in collecting reliable and internationally comparable drug abuse data, in building capacity at the local level to collect data that can guide demand reduction activities, and in improving cross-national, regional and global reporting on drug trends. To support that process, the GAP Toolkit Module 1 has been produced to assist States Members of the United Nations in developing culturally appropriate systems, relevant to the countries concerned, for collecting drug information, to support existing drug information systems by promoting their conformity with internationally recognized standards of good practice, and to focus on harmonization of drug abuse indicators.