Anesthesiology
American Society of Anesthesiologists - Info about the society, publications, patient education materials, policy statements, articles and links.
Anesthesia and Critical Care - Educational resources, research projects, grant information and links to other sites.
Global Anesthesiology Server Network - A one stop source for anesthesiology resources on the web.

Cardiology
American College of Cardiology - Contains organizational information on this medical society and teaching institution.

Endocrinology
National Institute of Diabetes and Digestive and Kidney Diseases - Material on endocrine and digestive systems and nutrition.

Infectious Disease
Infectious Diseases in Children - News, forums, on-line seminars and chat rooms all related to infectious diseases in children.
Tulane Tropical Medicine Home Page - Focuses on the work of the Department of Tropical Medicine and other health related links.

Nephrology
Cure Paralysis Now Home Page - Info on the causes, nature of, attitudes about, research on and possible cures of spinal cord injuries.
Neurosciences on the Internet - Up-to-date, comprehensive search services for neuroscience-related resources on the web.
Neurosurgeons and Topics in Neurosurgery - Links to neurosurgeons and Internet resources on neurosurgery.
RENAL NET - A collection of educational materials and conference agendas.
Whole Brain Atlas - Sagittal x-ray images of the brain, brain diseases, normal brain functions and infectious diseases.

Obstetrics/Gynecology
Center for Prenatal Diagnosis - Articles, images and links on ultrasound, prenatal diagnosis, genetic counseling and maternal fetal medicine.
OBGYN Net - Physician-reviewed service for medical professionals, women and the medical industry.

Oncology
Breast Health and Breast Cancer Network - Info on breast cancer, support groups and specialists with articles.
CancerNet - Cancer research, treatments, statistics, patient care and more.
Medicine on Line-Cancer Info. Center - Features a broad range of cancer-related educational resources and links.
Memorial Sloan-Kettering Cancer Center - Info for professionals on biomedical innovations, consumer-focused info on prevention and early detection, and an overview of the disease.
OncoLink-Pennsylvania Cancer Resource - One of the best sites for news, statistics, informative articles and innovative Internet pedagogical techniques.
University of Michigan Comprehensive Cancer Center - Info on cancer, UMCCC's cancer research results and other links.

Ophthalmology
American Association for Pediatric Ophthalmology and Strabismus - Lectures and papers, patient info, suggested readings and links to relevant sites.
Digital Journal of Ophthalmology - Journal published on the web with cases from the Massachusetts Eye and Ear Infirmary's ground rounds.
Eyenet - Info on ophthalmology and over 300 links to web resources.
Molecular Vision - Online medical journal, includes material on biology and genetics of the visual systems.

Pathology
University of Washington Pathology World Wide Web Server - Cytogenetics gallery with images, explanations and links to other resources.
Urbana Atlas of Pathology - Large collection of images with brief explanations.

Radiology
BrighamRAD - Radiology cases at Brigham and Women's Hospital, and links to other radiology sites.
CHORUS - Quick reference hypertext on diseases, radiological findings and differential-diagnosis lists.
MIR Image Processing Laboratory - Provides education info and training applications, such as medical imaging, computer-aided design, and scientific and business visualization.
Radiological Society of North America (RSNA) - Info on research, funding opportunities, education, publications, learning resources and meeting info with links to other sites.
Thoracic Radiology from the University of Michigan - Imaging modalities used to identify and access the anatomical structures within the thorax.
University of Washington Radiology - UW Case studies, teaching files, online text books and continuing medical education credit info.

Surgery
1-800-SURGEON-Worldwide Surgeon Referrals - Directory of surgeons by area, country or states with links to hospitals and surgery centers.

Toxicology
Agency for Toxic Substance and Disease Registry - Info about the agency's activities, lists of toxic substances, national health alerts, public health pamphlets and case studies.