What is PGI?

PGI (Portland Group, Inc.) was a company that developed high-performance parallel compilers and tools, primarily for x86 processors and GPUs. NVIDIA acquired PGI in 2013. PGI compilers were widely used for scientific and engineering applications, especially those requiring significant computational resources. They supported Fortran, C, and C++ and offered features such as automatic parallelization, GPU acceleration (CUDA), and optimization for specific hardware architectures. Although the PGI brand is no longer actively used, its technology has been integrated into NVIDIA's HPC software development tools, particularly the NVIDIA HPC SDK.