A PDF file originally called a portable document format is a file format
used to represent documents independently through application software,
hardware and operating systems. Each PDF file captures a complete description
of a fixed layout flat document including the text, font, graphics and other
information needed to display it. In 1991, John Warnock the co-founder of Adobe
Systems outlined a system called “Camelot” which then developed into PDF.
PDF files are useful for documents such as magazine articles, product
brochures, or flyers in which you want to preserve the original graphic
appearance online. A PDF file contains one or more page images, each of which
you can zoom in on or out from. You can page forward and backward.
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