The ALS Association site offers a clear lay-language description of the disease, referral information for local chapters and support groups, and a description of publications that may be ordered from the Association.
The genetics behind ALS are outlined in clear lay language by Genetics Home Reference, a service of the US National Library of Medicine.
The Muscular Dystrophy Association focuses its mission on more than 40 neuromuscular diseases, including ALS. Its extensive and well-organized site includes an on- line version of The ALS Newsletter, medical information about ALS and other neuromuscular diseases, a searchable database of clinics, and "Ask the Experts," which focuses both on current research developements and on medical management of neuromuscular conditions such as ALS.
The National Institute of Neurological Disorders and Stroke’s Amyotrophic Lateral Sclerosis page provides scientific, but accessible, material on the ALS prognosis and treatment options, along with links to current research studies and other organizations.