AMD APP (formerly ATI Stream) technology is a set of advanced hardware and software technologies that enable AMD graphics processing cores (GPU), working in concert with the system's x86 cores (CPU), to accelerate many applications beyond just graphics. This is AMD's impementation of OpenCL on top of Radeon hardware. You'll need a compatible card and recent Catalyst drivers. See http://developer.amd.com/sdks/AMDAPPSDK/pages/DriverCompatibility.aspx for a complete list of requirements. NOTES: This package is compatible only with x86 and x86_64 architectures. The download links point to a license agreement page. If you agree to that license, you'll then be able to download the files.