E-book

**Digital book **
A digital book  is a book in digital format that can be read inelectronic equipment such as computers, PDAs, digital bookreader , or even cell phones that support this feature . The most common formats of ebooks are PDF , HTML andePUB . The first need of the popular file reader Acrobat Reader or other compatible program, while the second format need anInternet browser to open. EPUB is a digital file format specific standard for ebooks.  Because it is a storage device for little cost, and easy to accessdue to the spread of Internet in schools, can be sold to provide our customers or even download some free Internet portals.