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In this class, we will introduce OpenCL™. We start with an overview of GPU compute since the desire to take advantage of modern GPU computational power in general applications was a main motivator in the development of OpenCL™. The discussion includes some of the early APIs developed to harness the increasing programmable computational power available in modern graphics processors.We then introduce the anatomy and programming model of OpenCL™ and take you through some of the highlights of installing the ATI Stream SDK v2 which includes support for OpenCL™ 1.0 on x86 CPUs and AMD GPUs. Then, the practical portions of the OpenCL™ runtime and kernel specifications are discussed in detail.At the end, we discussion optimization tips to help you avoid common pitfalls when coding your applications in OpenCL™. For students who may have existing code written for the proprietary interface, CUDA, we discuss the easy steps involved in porting that code to OpenCL™.