HPC or High Performance Computing is a branch of computer science all about increasing the performance of computation. It has been used in academia and various industries to solve the hardest problems known to us.
Data Science and Machine Learning is a subset of HPC and was made into their own category because of the sheer growth and need for specialization. But the techniques and practices of HPC is still prevalent in these spaces.
In this video Ali Zaidi and Mofi Rahman take a high level look at what HPC is and a simple architecture of HPC application.