  We demonstrate the existence of topological superconductors (SC) protected by
mirror and time reversal (TR) symmetries. D-dimensional (D=1,2,3) crystalline
SCs are characterized by 2^(D-1) independent integer topological invariants,
which take the form of mirror Berry phases. These invariants determine the
distribution of Majorana modes on a mirror symmetric boundary. The parity of
total mirror Berry phase is the Z_2 index of a class DIII SC, implying that a
DIII topological SC with a mirror line must also be a topological mirror SC but
not vice versa, and that a DIII SC with a mirror plane is always TR trivial but
can be mirror topological. We introduce representative models and suggest
experimental signatures in feasible systems. Advances in quantum computing, the
case for nodal SCs, the case for class D, and topological SCs protected by
rotational symmetries are pointed out.
