Between the first edition of the Compendium (1992) and the present one, new standards and norms have been developed and five binding legal instruments have been negotiated and adopted by the international community: the United Nations Convention against Transnational Organized Crime and its three supplementary protocols (the Protocol to Prevent, Suppress and Punish Trafficking in Persons, Especially Women and Children; the Protocol against the Smuggling of Migrants of Land, Sea, and Air; and the Protocol against the Illicit Manufacturing of and Trafficking in Firearms, Their Parts and Components and Ammunition) and the United Nations Convention against Corruption. The Compendium is structured according to a new clustering system articulated as follows: (1) standards and norms related primarily to persons in custody, non-custodial sanctions, and juvenile and restorative justice; (2) standards and norms related primarily to legal, institutional, and practical arrangements for international cooperation; (3) standards and norms related primarily to crime prevention and victim issues; and (4) standards and norms related primarily to good governance, the independence of the judiciary, and the integrity of criminal justice personnel. The intent of this updated version of the Compendium is to contribute to a wider awareness and dissemination of the United Nations standards and norms in crime prevention and criminal justice, and consequently, to reinforce respect for the rule of law and human rights in the administration of justice.