This document provides an overview of various exceptionalities or categories of disabilities and impairments. It defines disability as a measurable impairment that interferes with abilities, and handicap as a disadvantage resulting from a disability. The categories discussed include specific cognitive/academic difficulties like learning disabilities and ADHD, social/emotional/behavioral difficulties like autism and mental retardation, physical disabilities and health impairments, sensory impairments like visual and hearing impairments, and giftedness. The document also discusses people-first language which emphasizes abilities over limitations and avoids generic labels.