  In this paper, we examine some basic properties of the multiple-Sine-Gordon
(MSG) systems, which constitute a generalization of the celebrated sine-Gordon
(SG) system. We start by showing how MSG systems can be viewed as a general
class of periodic functions. Next, periodic and step-like solutions of these
systems are discussed in some details. In particular, we study the static
properties of such systems by considering slope and phase diagrams. We also use
concepts like energy density and pressure to characterize and distinguish such
solutions. We interpret these solutions as an interacting many body system, in
which kinks and antikinks behave as extended particles. Finally, we provide a
linear stability analysis of periodic solutions which indicates short
wavelength solutions to be stable.
