The following is a comparison of e-book 12 books that changed the world pdf used to create and publish e-books. See table below for details.
The digital book format originally used by Sony Corporation. 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.
Multiple pages and embedded graphics are distributed along with metadata as a single compressed file. The indexing is both for keywords for full text search.
XML-based open standard maintained by the DAISY Consortium for people with print disabilities. 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. DOC is a document file format that is directly supported by few ebook readers.