Libraries that are units of or affiliated with the federal government and which serve as copyright depositories for materials published in the country, compile and maintain a national bibliography, collect international materials for scholarly use, produce and distribute bibliographic tools such as subject headings listings, develop and maintain standards for bibliographic practices, coordinate a network of libraries nationwide and/or provide reference and other library services for federal employees.

Libraries supported by public and/or private funds which provide general library services without charge to all residents of a given community, district or region.

Libraries or other organizations that maintain collections of books, magazines and other reading material on cassettes, CDs or in digital file formats and make them available on a loan basis to residents of the community who are blind or have visual impairments, dyslexia or other related disabilities. Also included are organizations that distribute cassettes, CDs, or digital files of this type that people can keep.

Libraries or other organizations that maintain collections of books, magazines and other reading materials in Braille, a system that uses raised dots to represent numerals and letters of the alphabet which can be identified by the fingers, that are made available on a loan basis to community residents who are blind or who have visual impairments. Also included are organizations that distribute copies of books, magazines and other reading material in Braille format that people can keep.

Individuals who are generally between the ages of 18 and 25 depending on the ages that specific programs use for qualification.

A learning disability that is characterized by difficulty translating written images into meaningful language. There are two types of learning disabilities in reading. Basic reading problems occur when there is difficulty understanding the relationship between sounds, letters and words. Reading comprehension problems occur when there is an inability to grasp the meaning of words, phrases and paragraphs. Signs of reading difficulty include problems with letter and word recognition, understanding words and ideas, reading speed and fluency, and general vocabulary skills.

Any of a variety of conditions that may be due to muscular, skeletal or neuromuscular disorders, paralysis or absence of one or more limbs, which impose physical limitations on the individual.

Eye, optic nerve or brain malfunctions which prevent affected individuals from seeing normally. Eye disorders that can lead to visual impairments include retinal degeneration, albinism, cataracts, glaucoma, muscular problems that result in visual disturbances, corneal disorders, diabetic retinopathy, congenital disorders and infection.