This directory contains the low-level tensor libraries for PyTorch. This code traces its lineage from the original Torch. There are multiple variants of the library, summarized here:

• TH = TorcH
• THC = TorcH Cuda
• THCS = TorcH Cuda Sparse
• THCUNN = TorcH CUda Neural Network (see cunn)
• THD = TorcH Distributed
• THNN = TorcH Neural Network
• THPP = TorcH C++ (see thpp)
• THS = TorcH Sparse

(You'll also see these abbreviations show up in symbol names.)