"RIAs created with Flex can run in the browser using Adobe Flash® Player software or on the desktop on Adobe AIR™, the cross-operating system runtime. This enables Flex applications to run consistently across all major browsers and on the desktop. And using AIR, Flex applications can now access local data and system resources on the desktop. Both Flash Player and Adobe AIR are available as a free download on Adobe.com."

"Flex allows web application developers to efficiently create highly interactive, expressive interfaces for web and desktop applications. Engaging applications built with Flex can reach more users, improve productivity and satisfaction, and generate increased profits. Flex applications leverage the Adobe® Flash® Player 9 runtime. Installed on over 98% of Internet connected computers, Flash Player uniquely provides a consistent, accessible user experience across browsers and platforms. It is an enterprise-class client runtime with advanced vector graphics capable of handling the most demanding, data-intensive applications while performing at desktop application speeds."

Adobe AIR integration

"The new Adobe AIR™ client runtime enables rich Internet applications (RIAs) to run on the desktop, creating new opportunities for more engaging, high-performance online/offline applications. The Flex framework provides native support for the new AIR APIs, and Adobe Flex Builder™ 3 software provides all the tools necessary to build, debug, package, and sign applications built on Adobe AIR."

* Adobe web site - http://www.adobe.com/products/flex/overview/