File Format Information:. PDF (Portable Document Format) is a formatting language developed by Adobe, an extensible page-description protocol that implements the native file format based on PostScript language, uses standard compression algorithm, documents can contain text, graphics, multimedia, custom data types and more. AZW (Amazon Word) is a proprietary e-book format from Amazon, based on the original MOBI format using the high compression option, used on both eBook files that are protected with DRM and files that are not protected. The file extensions can be.azw3,.azw4,.azw,.kf8.
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