According to Adobe, PDF stands for "Portable Document Format." It is a standard format for electronic document exchange, as listed by the International Organization for Standardization.

The strength of the PDF format is that the contents of the file appear electronically as they would if printed. Documents, forms, graphics and Web pages are able to be stored, edited and shared. The PDF format is compatible with Windows, Mac OS, iOS, Android and more. The authenticity of a PDF file is ensured through digital signatures or digital certificates. Password protection is also an option. PDF is the standard electronic document format of businesses and government agencies worldwide.