The Pros and Cons of Cancer Registration.- Unification of Hospital-Based Cancer Registries.- Planning and Evaluation of Oncologic Registries.- The Collection of Available Information: Possibilities and Limitations of International Standardization.- Problems in the Initiation of a Cancer Registry.- The Computerized Registry.- The Ninth Revision of ICD Chapter on Neoplasms and its Application in Oncology.- Histological Classification and its Implications in the Utility of Registry Data in Epidemiological Studies.- Uses of Cancer Registry Data for Planning and Administration of a Cancer Control Program.- The United States Network of Cancer Registries.- The Evaluation of Data Collection Procedures — Assessment of Completeness.- Operation of Cancer Registries.- Administrative Use of the Cancer Registry in the German Democratic Republic.- Linkage of the Icelandic Cancer Registry to an Icelandic Population File.- Experiences of the Cancer Registry in Slovenia.- Cancer Registry Data Versus Mortality Statistics.- Hints on the Evaluation of a Regional Cancer Registry with no Legal Basis.- Cancer Registry South Württemberg-Hohenzollern. First Report.- Studies of Epidemiology.- Contributions of Cancer Registries to Epidemiological Research.- Pointers from Regional Variation in Incidence — International Perspectives.- The Comparability of Cancer Incidence Rates.- The Use of Cancer Registry Data in the Investigation of Industrial Carcinogenic Hazards.- The Cancer Registry of Cali Colombia — Epidemiologic Studies of Gastric Cancer.- The Persistence of Differences in Cancer Incidence at Various Anatomical Sites 1300 Years after Immigration.- Closing Remarks.- The Future of Cancer Registry.