PGI (formerly The Portland Group, Inc.) was a company that produced a set of commercially available Fortran, C and C++ compilers for high-performance computing systems.

[3][4] The Portland Group was founded as a privately held company in 1989, using compiler technology developed at and acquired from Floating Point Systems Inc.

[6] In 1996, PGI developed x86 compilers for the ASCI Red Supercomputer at Sandia National Laboratories,[7] the first computer system to sustain teraflop performance.

PGI and NVIDIA have both participated in the specification of the new standard OpenACC directives for GPU computing since it was first announced on November 3, 2011.

[3] [4] PGI compilers incorporate global optimization, vectorization, software pipelining, and shared-memory parallelization capabilities targeting both Intel and AMD processors.