They are used in a variety of occasions, including medical and legal documents, government forms, and invoices. PDFs are now one of the most popular ways to share documents.
PDFs also support a number of security features, such as encryption, password protection, digital signatures, and document watermarking. This, in turn, makes PDFs resolution independent, meaning that the quality of the document remains consistent no matter what type of device or program it is viewed in. PDFs use a vector-based drawing model, which means that it stores graphical elements (lines, shapes, images, etc.) as mathematical equations. It was designed to provide a platform-independent way of storing and sharing documents, across different operating systems and over the Internet.
PDF (Portable Document Format) is a document file format that was developed by Adobe Systems in 1993.
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