  A flux liquid can condense into a smectic crystal in a pure layered
superconductor with the magnetic field oriented nearly parallel to the layers.
Similar order can arise in low temperature $^4$He films with a highly
anisotropic periodic substrate potential. If the smectic order is commensurate
with the layering, this periodic array is {\sl stable} to quenched random
point--like disorder. By tilting and adjusting the magnitude of the applied
field, both incommensurate and tilted smectic and crystalline phases are found
for vortex arrays. Related variations are possible by changing the chemical
potential in the helium system. We discuss transport near the second order
smectic freezing transition, and show that permeation modes in superconductors
lead to a small non--zero resistivity and a large but finite tilt modulus in
the smectic crystal. In helium films, the theory predicts a nonzero superfluid
density and propagating third sound modes, showing that the quantum smectic is
always simultaneously crystalline and superfluid.
