[Geriatrics on the internet].

National and international data networks for data transfer and communication are playing an increasingly important role in science and medicine. These networks already exist on a regional, national and international scale. The biggest international network, the Internet, offers more than 300 sites referring to "aging", which lead to a great number of other related pages. The access to the Internet and some examples of the information on aging available are presented here. This is to give the reader an impression of the present state of this worldwide data network, which may be useful for his professional use. At this stage, the author has the impression that conventional media such as journals, books and especially personal contacts are still sufficient to satisfy the need for professional information, and opinion that may well have to be reconsidered soon. In view of the future, however, it seems useful for medical societies to be represented on the Internet as soon as possible.