Reading only on paper is expensive. Digital versions of books are several times cheaper than printed editions, so many are ready to read on tablets, smartphones and special readers. Until recently, e-books existed only in software interpretation, in all kinds of formats, both conventional (for example, .txt, .doc, .htm, .chm, .pdf, .rtf, .djvu) and specific (for example, .fb2 ). Some software e-books are created as standalone applications in the format of executable exe files. social media marketing analyst <a href="https://telegra.ph/Business-Impact-of-Big-Data-on-Industries-10-07">taming big data with apache spark and python</a>
