An e-book reader, sometimes also called an e-book device, is a device used to display e-books An e-book is an e-text that forms the digital media equivalent of a conventional printed book, sometimes protected with a digital rights management system. E-books are usually read on personal computers or smart phones, or on dedicated hardware devices known as e-book readers or e-book devices. Many mobile phones can also be used to read e-books. It may be a device specifically designed for that purpose, or one intended for other purposes as well. The main advantages of these devices are portability, readability of screen in bright sunlight, and long battery life. Any Personal Data Assistant (PDA) capable of displaying text on a screen is capable of being an e-book reader, but without the advantages of e-ink displays.
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