The present volume is one of a series intended to provide a comparative view of the education systems of member countries of the Organisation for Economic Cooperation and Development (OECD). Published in response to a need for a conversion key so that national data could be readily converted on the bais of a standardized system, its purpose is to assist OECD member countries in the development of their educational statistics and to provide a basis for the collection of internationally comparable statistics. For background information on the method of classification, and for related documents, see ED 076 453. The volume deals with three member countries, Belgium, Denmark, and the United States. Provided are definitions of terms used in the OECD classification, which is by type of education and not be institution providing education. A short bibliography following each country gives sources of information regarding the educational institutions. (OPH)