DISCO solves the fully compressible Navier-Stokes equations for reacting flows with detailed chemical kinetics on rectangular domains. It employs a third-order low-storage Runge-Kutta scheme for time integration and compact higher-order finite-difference schemes for the spatial derivatives. The code is parallelized using domain decomposition and MPI. The code has been used to simulate turbulent expanding flame kernels and mixing layers. Besides detailed reaction mechanisms, it can also use FGM tabulated chemistry.