Help the studying ebooks are the format of the cell phone terminal; many e-books formats for UMD, JAR, TXT these three. International E-book has SOFT BOOK, POCKETBOOK, and so on. E-books, specifically the Elect RON IC E-book, from now on referred to because the book, additionally say Digital books, E ebook. 500 g “weight” and never greater than 1 cm thickness,