OpenACC (for open accelerators) is a programming standard for parallel computing developed by Cray, CAPS, Nvidia and PGI.
[1] As in OpenMP, the programmer can annotate C, C++ and Fortran source code to identify the areas that should be accelerated using compiler directives and additional functions.
[3][4] These efforts resulted in a technical report[5] for comment and discussion timed to include the annual Supercomputing Conference (November 2012, Salt Lake City) and to address non-Nvidia accelerator support with input from hardware vendors who participate in OpenMP.
[7][14] OpenUH[15] is an Open64 based open source OpenACC compiler supporting C and FORTRAN, developed by HPCTools group from University of Houston.
OpenARC[16] is an open source C compiler developed at Oak Ridge National Laboratory to support all features in the OpenACC 1.0 specification.
IPMACC[21] is an open source C compiler developed by University of Victoria that translates OpenACC to CUDA, OpenCL, and ISPC.
[28] In a way similar to OpenMP 3.x on homogeneous system or the earlier OpenHMPP, the primary mode of programming in OpenACC is directives.