Adobe Acrobat is a family of computer programs developed by Adobe Systems, designed to view, create, manipulate and manage files in Adobe’s Portable Document Format (PDF). Some software in the family, particularly the creating software, is commercial, and some is freeware. Adobe Reader (formerly... 

Mozilla Firefox is a free and open source web browser which managed by the Mozilla Corporation. The Firefox is a program descended from Mozilla Application Suite, and has being the second most popular browser after Internet Explorer. As of October 2008, Firefox has recorded 19.97% usage of whole internet...