The National Organization for Rare Disorders (NORD) is a nonprofit "federation of voluntary health organizations dedicated to helping people with rare 'orphan' diseases and assisting the organizations that serve them. NORD is committed to the identification, treatment, and cure of rare disorders through programs of education, advocacy, research, and service." In accordance with their educational commitment, NORD provides this extensive online Index of Rare Diseases. The alphabetized Index contains entries on hundreds of diseases. Entries include brief descriptions, disease synonyms when available, and links to any related organizations. NORD also maintains a Rare Disease Database, as well as an Organizational Database, and Index of Organizations.