Callahan Museum of the American Printing House for the Blind, Louisville, KY

An amazing small museum located on the 4th floor of the APH. Embossed books started very early when, in 1854, Morrison Heady collected donations to produce Milton’s Paradise Lost in raised letters. Standardized Braille was introduced in 1932. In 2007, the APH introduced a PDA with a Braille-style keyboard that functions as a word processor, calendar, wireless internet access, audio recorder and an MP3 player. Today there are thousands of Braille books in addition to digital audio books.