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.
Some people refer to dyslexia as a language-based learning disability. Language-based learning disabilities are conditions that impact writing, reading, spelling and even math, as well as related problems with comprehension. Dyslexia is the clinical term used for one kind of specific learning disability.