An e-Reader or “e-book reader” is a portable hardware device that is specially designed to read digital publication.
These digital publications come under e-books, electronic magazines, and digital versions of newspapers. Since textual data does not require much storage space, most e-readers can easily store many thousands of books and other publications.
Just as an iPod is easily able to store an entire music library, similarly a single e-reader can easily store a large collection of books.
All these devices support many types of eBook Formats and with the help of them you can easily download many free and paid contents from a wireless network or from an internet connection.
Many e-readers have a monochrome display, also called “electronic paper”, while in others you may also see a full-color backlit display.
Since color images do not show in electronic paper displays, for this reason, their screen appears mostly like a paper page in a book, while it can be easily seen even in bright sunlight.
Tablets , such as the Apple iPad, the BlackBerry PlayBook, and the Amazon Kindle Fire, are considered e-readers, as they are primarily used to read digital publications.
By the way, if we call these devices as tablets, it would be more correct because they are not designed primarily as a digital reader. While tablets have more features which are not available in a digital reader.
At the same time, e-readers are more suitable for reading e-books and not tablets.
Synonyms: E-Book Reader