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.
Of all students with specific learning disabilities, 70â80% have deficits in reading. The term Developmental Dyslexia is often used as a synonym for reading disability; however, many researchers assert that there are different types of reading disabilities, of which dyslexia is one.