  The basic geometry of the Solar System -- the shapes, spacings, and
orientations of the planetary orbits -- has long been a subject of fascination
as well as inspiration for planet formation theories. For exoplanetary systems,
those same properties have only recently come into focus. Here we review our
current knowledge of the occurrence of planets around other stars, their
orbital distances and eccentricities, the orbital spacings and mutual
inclinations in multiplanet systems, the orientation of the host star's
rotation axis, and the properties of planets in binary-star systems.
