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’ve downloaded the Reader, it will start automatically whenever you want to look at a PDF file.
In 1991, Adobe Systems co-founder John Warnock outlined a system called “Camelot” that evolved into PDF. While Adobe Systems made the PDF specification available free of charge in 1993, PDF remained a proprietary format, controlled by Adobe, until it was officially released as an open standard on July 1, 2008, and published by the International Organization for Standardization as ISO 32000-1:2008.
In 2008, Adobe published a Public Patent License to ISO 32000-1 granting royalty-free rights for all patents owned by Adobe that are necessary to make, use, sell and distribute PDF compliant implementations
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. 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.
When you convert documents, forms, graphics, and web pages to PDF, they look just like they would if printed. But unlike printed documents, PDF files can contain clickable links and buttons, form fields, video, and audio — as well as logic to help automate routine business processes. When you share a PDF file, virtually anyone can read it using free Adobe Reader? software or the Adobe Reader mobile app.
Key Features of PDF
1:When you use PDF files to communicate, you don’t have to worry about whether people have the same software you used to create your originals.
2:The integrity and longevity of the more than one billion PDF files in existence today is ensured by the ISO 32000 open standard.
4:You can view and interact with PDFs on virtually any platform, including Windows?, Mac OS, and mobile platforms including Android? and iOS for iPhone and iPad.
5:Virtually anyone can electronically sign PDFs using free Adobe Reader XI software or Adobe Reader for mobile.