  In this paper we're considering the question of whether or not a partial
order on a finite set is realisable as a Smale order of a structurally stable
diffeomorphism or flow acting on a closed manifold. We classify the orders that
are realisable by 1) an $\Omega$-stable diffeomorphism acting on a closed
surface 2) an Anosov flow on a closed 3-manifold 3) a stable diffeomorphism
with trivial attractors and repellers acting on a closed surface.
