Trch s n pn-src mchn lrnng lbrry, scntfc cmptng frmwrk, nd scrptng lngg bsd n L. t prvds LJT ntrfcs t dp lrnng lgrthms mplmntd n C. t ws crtd by th dp Rsrch nsttt t PFL. Trch dvlpmnt mvd n 2017 t PyTrch, prt f th lbrry t Pythn.