PDF(Portable Document Format) is a file format that has captured all the elements of printed documents as an electronic image that you can view, navigate, print, or forwarded to someone else. PDF files are created using Adobe Acrobat, Acrobat Capture, or similar products. To view and use the files, you need the free Acrobat Reader, which you can easily download. Once you have downloaded the reader, it will start automatically whenever you want to look at a PDF file. PDF files are especially useful for documents such as magazine articles, product brochures, or flyers in which you want to presence the original graphic appearance online. A PDF file contains one can zoom in on or out from. You can page forward and backward.