AMD APP SDK replaced AMD Stream SDK (formerly named ATI Stream SDK). AMD CAL (Compute Abstraction Layer) SDK was replaced by ATI Stream SDK, available for Microsoft Windows and Linux, 32-bit and 64-bit. As of February 2021, there are few signs on the AMD official web site that AMD APP SDK ever existed.
"AMD APP SDK OpenCL Accelerated Parallel Processing". Archived from the original on 2014-07-01. Retrieved 2016-02-19. https://web.archive.org/web/20140701140057/http://developer.amd.com/tools-and-sdks/opencl-zone/opencl-tools-sdks/amd-accelerated-parallel-processing-app-sdk/ ↩
"Opencl - What's the difference between AMD's APP SDK and (AMD) ATI's Stream Technology?". https://stackoverflow.com/questions/9473420/whats-the-difference-between-amds-app-sdk-and-amd-atis-stream-technology ↩
"Is AMD APP SDK 3.0 no longer available on AMD website? · Issue #1511 · fireice-uk/XMR-stak". GitHub. https://github.com/fireice-uk/xmr-stak/issues/1511 ↩
"Where to find AMD APP SDK 3.0 for Linux?". 30 April 2018. https://community.amd.com/thread/228059#comment-2866963 ↩
"Download OpenCL AMD APP SDK 3.0 for windows and linux". https://stackoverflow.com/questions/53070673/download-opencl-amd-app-sdk-3-0-for-windows-and-linux ↩