In the United States, Learning Ally, AMAC Accessibility, Bookshare, and the National Library Service for the Blind and Physically Handicapped (NLS), among others, offer content to blind and visually impaired individuals. Learning Ally and Bookshare also allows access by those with dyslexia or other disabilities which impair the person's ability to read print. The NLS uses a library methodology, on the basis that the books are loaned (as they traditionally have been, on physical cassette), hence they are able to offer content free of charge, just as any public library can. Learning Ally and Bookshare both are subscription-based services. Bookshare membership is free to U.S. students due to funding from the U.S. Department of Education.