The best ereader for pdf table below for details. More recently, Sony has converted its books from BBeB to EPUB and is now issuing new titles in EPUB. CHM format is a proprietary format based on HTML.
The indexing is both for keywords for full text search. DAISY has wide international support with features for multimedia, navigation and synchronization. K-12 textbooks and instructional materials are now required to be provided to students with disabilities. DAISY is already aligned with the EPUB technical standard, and is expected to fully converge with its forthcoming EPUB3 revision. It includes advanced compressors optimized for low-color images, such as text documents. Individual files may contain one or more pages.
The format is designed to decompress very quickly, even faster than vector-based formats. Several dozens of 300 DPI black-and-white scans can be stored in less than a megabyte. Its advantages as an ebook format is that it can be easily converted to other ebook formats and it can be reflowed. It can be easily edited.