An instruction manual for coders, statisticians, analysts, and other users of the ICD. The opening chapter introduces the purpose and application of the ICD, its basic structure, and the principles of classification. The next chapter, which explains how to use the ICD, presents practical information which all users need to know in order to exploit the classification to its full advantage. Instructions cover the use of inclusion and exclusion terms, the "asterisk and dagger" system of dual coding, special conventions used in the tabular list, and the use of asterisk categories, categories limited to one sex, and sequelae categories. The most extensive chapter, on mortality and morbidity coding, provides information on rules and guidelines for the selection of a single cause or condition for routine tabulation from death certificates and morbidity records. Guidelines are also provided for the application of the rules for coding of the condition selected for tabulation. Statistical presentation is covered in the next chapter, which presents the regulations regarding statistics for international comparison and guidelines on data presentation in national and subnational statistical tables. An outline of the historical development of the ICD concludes the volume.