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.
Â· Pastoral. Developmental dyslexia is a reading disability and a learning disability which causes problems with reading and writing. Its standard definition is a difficulty in reading and writing in spite of normal or above-average intelligence and cognitive abilities. The word dyslexia comes from the Greek words Î´ÏÏ- dys- (impaired) and Î»Î­Î¾Î¹Ï lexis (word).