The English acronym PDF stands for Portable Document Format (Portable Document Format), a file format created by the company Adobe Systems so that any document can be viewed, regardless of the program that originated it.
For example, a document created in Microsoft Word when converted to PDF format can be viewed on other devices in an identical way to the original document, regardless of whether or not you have the Word program installed.
The big advantage of PDF files is the ability to maintain the quality of the original file, be it text or an image.
To produce files in PDF format, the user can purchase the Acrobat program, generate files directly from graphic programs (Photoshop, Illustrator, CorelDraw, etc.), or convert formats other than Word, such as images with the .png extension or documents HTML.
Acrobat Reader is the PDF reading program and is distributed free of charge by Adobe. It is through this program that the user can view or print a document that has the ".pdf" extension.