Portland Group, Inc.

The Portland Group, Inc. (PGI) is a premier supplier of software compilers and tools for parallel computing, known as PGI® products. PGI offers optimizing parallel FORTRAN 2003, C99 and C++ compilers and tools for workstations, servers and clusters running Linux, MacOS or Windows operating systems based on the following microprocessors:

64-bit Intel 64 technology CPU (Intel Core/Xeon/i3,i5,i7 families and related processors)
64-bit AMD64 technology CPU (AMD Opteron family and related processors)

NVIDIA CUDA GPGPU (Tesla 10/20 product series)
The focus of PGI is to provide the highest performance, production quality cross-platform compilers and software development tools to the High Performance Computing (HPC) market.