The main tool for reading, browsing and printing Adobe Reader PDF Document (Adobe Acrobat).
PDF file has become a standard internet and Adobe Reader will allow you to read and work with them.
Adobe Reader 9.1 is really better than ever and now it has improved many features. Now you can print PCL and Adobe PostScript, it supports large documents, ...
It incorporates itself into your web browser and makes your work easier.
If you usually work with PDF files, Adobe Reader is a very good choice.