Let's start the journey by looking back into the history of computing and why OpenCL is important from the respect that it aims to unify the software programming model for heterogeneous devices. The goal of OpenCL is to develop a royalty-free standard for cross-platform, parallel programming of modern processors found in personal computers, servers, and handheld/embedded devices. This effort is taken by "The Khronos Group" along with the participation of companies such as Intel, ARM, AMD, NVIDIA, QUALCOMM, Apple, and many others. OpenCL allows the software to be written once and then executed on the devices that support it. In this way it is akin to Java, this has benefits because software development on these devices now has a uniform approach, and OpenCL does this by exposing the hardware via various data structures, and these structures interact with the hardware via Application Programmable Interfaces (APIs). Today, OpenCL supports CPUs that includes x86s, ARM and PowerPC and GPUs by AMD, Intel, and NVIDIA.