Since the new Handbook of Medical Informatics was published in 1997, a p-version of a web site (“MI WEB”) has been opened that supports the teaching of the Handbook. MI Web refers to the text of the full Handbook, using an extensive Glossary that is shared by both the paper Handbook and the web site. New material for teaching will continuously be added to the MI Web, realizing that the field of health informatics is progressing exponentially, that the teaching of medical informatics is of great importance for students in medicine and health care, and that these students will be the health professionals of the future. Training in medical informatics is also of value for practicing clinicians who are overwhelmed by the avalanche of systems that are available on the market.