3、The application is a simple PDF viewer that allows users to view and interact with a PDF file using Adobe's Acrobat Reader control.
2、Xpdf is an open source Adobe Acrobat viewer for Portable Document format (PDF) files (because so much online information is sitting in PDF, a PDF viewer is almost like a second browser).
4、Most PDF viewers show these as menus in a left-hand window.
1、Sumatra PDF Portable - a lightweight PDF viewer
