Jetstream is the group's primary code. It is written in Fortran (F90 standard), with MPI for parallelization. It is a package which includes Euler and Navier-Stokes flow solvers as well as capabilities to perform aerodynamic shape optimization. The flow solver is called Diablo, which, when coupled with the geometry parameterization and control, mesh movement, gradient evaluation, and optimization packages forms the aerodynamic shape optimization suite, Jetstream.