http://www.chadd.org/
"AD/HD" (attention-deficit/hyperactivity disorder) is the term now used for a condition which has had several names over the past hundred years. Science recognizes three subtypes of AD/HD (inattentive, hyperactive-impulsive, and combined). A diagnosis of one type or another depends on the specific symptoms (i.e. the "diagnostic criteria") that person has

This link is full of info ... from child to adults with this. Lots of groups to join very organized web site
http://www.add.org/index.html