The Division for Biomedical Technology Research and Research Resources (DBTRRR) at the National Center for Research Resources (NCRR) supports a large network of Biomedical Technology Resource Centers. Scientists at these centers ensure that biomedical investigators who have NIH-supported projects may gain access to the newest and most advanced technologies, techniques, and methodologies. This Biomedical Technology Resources directory first organizes these resource centers by specialization. Individual entries for each center describe the resource goals and provide contact information and Web site addresses.