During these 3 days you will get an idea of OpenCL, learn how to launch OpenCL programs on the HybriLIT heterogeneous cluster and develop your own applications using OpenCL. In the course of the tutorial, participants will be provided with interesting examples and tasks. Event program: Day 1: Lecture on "Introduction to OpenCL for computations using GPU", compilation and launching of OpenCL programs on the heterogeneous cluster. Day 2: Practice with OpenCL, memory hierarchy, routine algorithms of parallel reduction for binary operations. Day 3: Writing your own program.