Plain paper book has a number of shortcomings, along with such obvious advantages as a small price, simplicity and ease of use. The main limitation of this edition is it static. Great difficulties arise for the publishers of encyclopedias: only once revised and amended book will be sold-that, as scientists discover or invent something new, and encyclopedia in one moment is out of date. Life of these days is like water in the river, and any reference data are short-lived. It is possible to chat virtually. Now, if you can manage all the sold books at a distance, it will be great! You corrected in the editorial copy the random error, wrote the line, or put another new leaf - and as if by magic, these changes appear to all readers. All this is possible in the electronic version. The drawings that illustrate an ordinary book are motionless and silent. The illustrations are lack of volume - the miraculous properties perception of it has given to man by nature. The book gives a verbal description of events and phenomena. Certainly, it is on the one hand, it limits the possibilities, but on the other - the book thus awakens the reader's fantasy, causing it to create a virtual world in his imagination. And this is a source of binding, even if not always conscious co-creation the reader with the author. This is the main difference and advantage of the ordinary books from the electronic version. Whatever it was, long ago people think about how to empower ordinary paper books. The question of a new "paperless" book would have remained open for a long time, if computer does not come into the world. Modern displays provide high quality images and can be accompanied by an electronic text is not only multicolored illustrations (with a much greater range of colors than the best printing), but also sound, animation and video clips. You do not have to search long and hard in the electronic book the desired page or a quote - the computer does it for you. Thanks to the technology of hypertext and a keyword search only one mouse click to find the desired chapter, a detailed explanation of the selected text in the term, found in a given word or phrase. Also, the computer can easily remember the whole way, "passed" when you reading electronic book and will repeat it both forward and backward.
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