Since the early nineteenth century invention of braille, the concept of making written content available to the blind or visually impaired has been a noble aspiration of civilized society. Making that concept a practical reality is another matter. Even as new, more automated, technologies arise, the challenges of accessibility remain formidable. For educational publishers, accessibility is particularly important. In the United States, schools receiving federal funding support are required to provide accessible content to any student or parent who requests it.