  This article will give an overview on the normal- and superconducting-state
properties of organic superconductors. There are a number of review articles on
this subject - most of them focus on either the quasi-one-dimensional or
two-dimensional materials. The intention of the present review is therefore to
provide a discussion which covers aspects common to both families on the same
footing. Instead of reviewing the whole diversity of behaviors found among the
various compounds with all their structural and chemical modifications, we will
mainly focus on selected compounds of both families. These are the most
extensively studied and best characterized (TMTSF)_2X and (BEDT-TTF)_2X salts
whose properties are representative for a wide class of materials. Special
attention is paid to the more recent developments including the controversial
discussions of some aspects, in particular the discussion on the nature and
symmetry of the superconducting state.
