In the world of technology, PDF stands for portable document format. The purpose of this format is to ensure document presentation that is independent of hardware, operating systems or application software.
A document in PDF format is a fixed-layout flat document by description. It includes all of the necessary fonts, graphics, text and other information that a computer requires for proper display. This format is thanks to Adobe Systems, and there are many different versions since its inception. Today, this is a popular format because it is so universal. The one drawback is that once you convert a Word document to PDF there is no going back.