What is "PDF"?

Adobe Portable Document Format was invented by Adobe Systems and perfected over 15 years, Adobe Portable Document Format (PDF) lets you capture and view robust information — from any application, on any computer system — and share it with anyone around the world.

Adobe® Reader® is free, universal software that lets you open, view, search, and print Adobe Portable Document Format (PDF) files with built-in security features. To date, more than 500 million copies of Adobe Reader have been distributed worldwide on 23 platforms and 26 languages.