Digital formatMain article: e-book The term e-book is a contraction of "electronic book"; it refers to a book-length publication in digital form.[20] An e-book is usually made available through the internet, but also on CD-ROM and other forms. E-Books may be read either via a computer or by means of a portable book display device known as an e-book reader, such as the Sony Reader, Barnes & Noble Nook or the Amazon Kindle. These devices attempt to mimic the experience of reading a print book. Throughout the 20th century, libraries have faced an ever-increasing rate of publishing, sometimes called an information explosion. The advent of electronic publishing and theInternet means that much new information is not printed in paper books, but is made available online through a digital library, on CD-ROM, or in the form of e-books. An on-line bookis an e-book that is available online through the internet. Though many books are produced digitally, most digital versions are not available to the public, and there is no decline in the rate of paper publishing.[21] There is an effort, however, to convert books that are in the public domain into a digital medium for unlimited redistribution and infinite availability. This effort is spearheaded by Project Gutenberg combined withDistributed Proofreaders. There have also been new developments in the process of publishing books. Technologies such as print on demand, which make it possible to print as few as one book at a time, have made self-publishing much easier and more affordable. On-demand publishing has allowed publishers, by avoiding the high costs of warehousing, to keep low-selling books in print rather than declaring them out of print.
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