I think you all know what Adobe Reader (formerly Acrobat Reader) is. It's perhaps the most popular viewer for Adobe PDF files. This post features a portable edition of the Adobe Reader 9 software which you can carry around in USB flash drive or other portable storage medium.
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 is commercial, and some is freeware. Adobe Reader (formerly Acrobat Reader) is available as a no-charge download from Adobe's web site, and allows the viewing and printing of PDF files. Acrobat and Reader are widely used as a way to present information with a fixed layout similar to a paper publication.