A PDF file is a multi-platform document created by Adobe Acrobat or another PDF application. The PDF format is commonly used for saving documents and publications in a standard format that can be viewed on multiple platforms. In many cases, PDF files are created from existing documents instead of from scratch.
PDF files can be edited with Adobe Acrobat, a commercial software program. The format can be opened and viewed using the free Adobe Reader application or the Adobe Reader plug-in, which is available for web browsers and other programs. Search engines such as Google and Bing index PDF documents, so the Adobe Reader plug-in may be used to display PDF files within the browser window. Some browsers, such as Google Chrome, provide native support for PDF viewing without the Adobe Reader plug-in. Firefox can view PDF files with the PDF.js extension.
PDF files may contain text, images, forms, annotations, outlines, and other data. They preserve fonts and formatting electronically across multiple platforms and appear the same on the screen as when printed on paper.
View the PDF definition for more information.
NOTE: OS X users can create a PDF from a document using the Print dialog box. First select " " from the application's menu, then choose "Save as PDF" from the PDF drop-down menu in the lower-left corner of the window.