Adobe Reader 11 is the most popular program in the world for viewing, creating, managing and manipulating PDF (Portable Document Format) files. It is the standard that all other PDF readers are judged against. Publically released in 1993, Adobe Reader was originally priced at $50 per user before Adobe separated its product range to offer Adobe Reader freeware and their professional Adobe Acrobat versions. PDF became the file format of choice for businesses thanks to its cross platform flexibility and security capabilities.
Adobe Reader 11 UI is simple and intuitive. Classic tools (text selection, zoom, snapshots, find, etc.) can be accessed from the top navigation menu and buttons.
Adobe Reader XI is the safest version Adobe have released. This is mainly due the new Protected Mode which loads potentially hazardous items and code in a sandboxed area, isolated from the rest of your system.