Use of the World Wide Web (“the web”) and our knowledge of human genetics are both currently expanding rapidly. By allowing swift, universal, and free access to data, the web has already played an important role in human genetics research. It has also begun to change the way that information is shared in clinical genetics and, to a lesser degree, affect how education in human genetics occurs. There are scores of web sites helpful to those interested in either research or clinical aspects of human genetics. The web and related communication technologies should continue to play increasingly important roles in human genetics.