Notes.A + indicates that a codes is well suited to a particular regime, a − indicates that the code will fail or run very inefficiently, a ° indicates a limited capability; “small N” means a problem with a small number of bodies, N ≈ 2−100, “intermediate N” means N ≈ 100−10⁴, “large N” means N ≳ 10⁴, “collisionless” indicates gravitational dynamics with some form of softening, “collisional” means simulations without softening. “Centrally dominated” means problems were the dynamics is dominated by a massive central object, such as a solar system or cluster with a supermassive black hole. “Post-Newtonian” indicates whether the code includes post-Newtonian correction terms. Note this table does not address special requirements set by the timescales or the dynamic range of a problem, nor the choice of parameters that may affect the solutions.