MedicineNet.com - Features FAQs and information on osteoarthritis, causes, symptoms, treatment, and prevention.
MedlinePlus - Most common type of arthritis, especially among older people. Sometimes called degenerative joint disease or osteoarthrosis.
NIAMS - Patient handout on osteoarthritis, its symptoms, diagnosis, treatment, and research. From National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS).