''Single instruction, multiple thread'' (SIMT) is an "execution model" and abstraction on top of the hardware paradigm, ''[[SIMD|single Instructioninstruction, multiple data]]'', introduced by Nvidia:<ref>{{cite web |url=http://www.nvidia.com/content/PDF/fermi_white_papers/NVIDIA_Fermi_Compute_Architecture_Whitepaper.pdf |title=Nvidia Fermi Compute Arcitecture Whitepaper |date=2009 |website=http://www.nvidia.com/ |publisher=NVIDIA Corporation |accessdate=2014-07-17}}</ref><ref>{{cite web |url=http://dx.doi.org/10.1109/MM.2008.31 |title=NVIDIA Tesla: A Unified Graphics and Computing Architecture |date=2008 |website=http://www.ieee.org/ |publisher=IEEE |accessdate=2014-08-07 |page=6 {{subscription required|s}} }}</ref>
{{Quote| [The G80 Nvidia GPU architecture] introduced the single-instruction multiple-thread (SIMT) execution model where multiple independent threads execute concurrently using a single instruction.}}
SIMT is closely related to [[SIMD]].<ref>{{cite web |url=http://dx.doi.org/10.1109/MM.2008.31 |title=NVIDIA Tesla: A Unified Graphics and Computing Architecture |date=2008 |website=http://www.ieee.org/ |publisher=IEEE |accessdate=2014-08-07 |page=6 {{subscription required|s}} }}</ref>
