PDF stands for "Portable Document Format". A PDF is a digital file format used to represent electronic text, images and graphics. It supports both pixel-based (raster) and vector graphics.
PDF is a standard file format used in the print industry as it is not dependent on application software or hardware to display. It encapsulates images, fonts and other information required in one file for easy viewing, electronic transmission and printing.
The filename extension for PDF files is ".pdf"
To view PDF files, Adobe Acrobat Reader is available for free download.