Acrobat integrates directly with your Web browser, so if you come across a PDF document on the Web, you can view it directly from within your Netscape or Internet Explorer browser window. PDF files are used by companies and even the IRS to distribute documentation and other pieces of information about their products, and Adobe Acrobat Reader is the essential interpreter. You may not know what a PDF file is, but you've probably come across one at some point.
Adobe Acrobat Reader allows users to view PDF documents.