The revisions that followed contained minor changes, until the sixth revision of the classification system. The book was small compared with current coding texts.
At that time the classification system was contained in one book, which included an Alphabetic Index as well as a Tabular List. As a result, the first international conference to revise the International Classification of Causes of Death convened in 1900 with revisions occurring every ten years thereafter. The APHA also recommended revising the system every ten years to ensure the system remained current with medical practice advances. Bertillon’s system, and in 1898, the American Public Health Association (APHA) recommended that the registrars of Canada, Mexico, and the United States also adopt it. In 1893, a French physician, Jacques Bertillon, introduced the Bertillon Classification of Causes of Death at the International Statistical Institute in Chicago. The ICD is part of a "family" of guides that can be used to complement each other, including also the International Classification of Functioning, Disability and Health which focuses on the domains of functioning (disability) associated with health conditions, from both medical and social perspectives. Annual minor updates and three-yearly major updates are published by the WHO. ICD-11 is planned for 2015 and will be revised using Web 2.0 principles. The ICD-10, as it is therefore known, was developed in 1992 to track mortality statistics. The ICD is revised periodically and is currently in its tenth edition. The ICD is a core classification of the WHO Family of International Classifications (WHO-FIC). This system is designed to promote international comparability in the collection, processing, classification, and presentation of these statistics. The International Classification of Diseases is published by the World Health Organization and used worldwide for morbidity and mortality statistics, reimbursement systems and automated decision support in medicine. Such categories can include a set of similar diseases. Under this system, every health condition can be assigned to a unique category and given a code, up to six characters long. The International Statistical Classification of Diseases and Related Health Problems (most commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances, and external causes of injury or disease. For other uses of "ICD", see ICD (disambiguation).