Programs that identify infants, toddlers and in some cases, preschoolers who show evidence of or are at risk for lags in physical development, cognitive development, language and speech development, psychosocial development or self-help skills, and provide or coordinate the delivery of an enrichment program in order to minimize the potential for a developmental delay and to meet their current developmental needs. The program may include early identification activities (child find); a developmental evaluation; a review of family concerns, priorities and resources; meetings with the family to develop an individualized family service plan; service coordination to ensure that the individual and his or her family receive needed services which may include but are not limited to physical therapy, occupational therapy, audiology, health/medical services, nursing services, nutrition services, psychological services including specialized play groups or therapy sessions, counseling, speech and language assistance, special instructional services, transportation, and parenting skills development; and ongoing evaluation of the child's progress and his or her changing enrichment needs. Included are "birth to three" programs and federal, state or local programs that address the needs of slightly older children or children not otherwise eligible for "birth to three" programs.

Programs that maintain information about community resources that are appropriate for a specific target group or human services sector (for example, youth programs or addiction services) and which link individuals who are in need of specialized services with appropriate resources and/or which provide information about community agencies and organizations that offer specialized services.

A severe, chronic disability that is attributable to a cognitive, neurological or physical impairment or a combination of cognitive, neurological and physical impairments; that is manifested during the developmental period (prior to age 22); that is likely to continue indefinitely; and that results in substantial functional limitations in three or more areas of major life activity including self-care, receptive and expressive language, learning, mobility, self-direction, capacity for independent living, and economic self-sufficiency.

The natural or adoptive mothers and fathers of individuals who have physical, sensory, developmental, cognitive, mental or emotional limitations, whose own patterns of personal, social and familial coping have been significantly affected by their responsibility for and concern about the person.

Children and adolescents who have physical, sensory, developmental, cognitive, mental or emotional limitations, illnesses or injuries that affect their performance in school and their ability to engage in one or more major life activities.