Current teaching and learning materials in electronic format is the format to more development and the number of users increases continuously, as well as hardware and technology for a price level that general users can access much more e-book with the advantage in terms of time and cost-saving production costs can create the interaction with the user. Users can download from a computer or device that is easy. There is no need to have a shop. At the same time, the tools used in the creation of electronic media has a wide range of platforms, with the advantages disadvantages that are different.
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