The ABO system consists of A, B, AB, and O blood types. People with type A have antibodies in the blood against type B. People with type B have antibodies in the blood against type A. People with AB have no anti-A or anti-B antibodies.
Developmental dyslexia, or specific reading disability, is a disorder in which children with normal intelligence and sensory abilities show learning deficits for reading.
This meeting was held in Washington, DC, with input from Reid Lyon, Jack Fletcher, Sally and Bennett Shaywitz, Susan Brady, Hugh Catts, Guinevere Eden, Jeff Gilger, Harley Tomey, and me. The 1994 definition was revised as follows: Dyslexia is a specific learning disability that is neurobiological in origin.