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The PDF combines three technologies: A subset of the PostScript page description programming language for generating the layout and graphics. zip file format permits many compression algorithms, though DEFLATE is the most common. zip file may contain one or more files or directories that may have been compressed. ZIP is an archive file format that supports lossless data compression. Each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, graphics, and other information needed to display it. The Portable Document Format (PDF) is a file format used to present documents independent of application software, hardware, and operating systems. Application/pdf, application/x-pdf, application/x-bzpdf, application/x-gzpdf
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