About PDF
Portable Document Format (PDF) is a file format created by Adobe Systems in 1993 for document exchange. PDF is used for representing two-dimensional documents in a manner independent of the application software, hardware, and operating system. Readers for many platforms are available, such as Adobe Acrobat Reader, Foxit, Preview, Xpdf, Evince, Okular, and KPDF. Most PDF readers are generally use for free. PDF files are especially useful for documents such as magazine articles, product brochures, or flyers in which you want to preserve the original graphic appearance online.
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