  Globular cluster systems provide valuable fossil records of the formation
history of their parent galaxies. This review specifically concentrates on
using color distributions of the globular cluster systems of elliptical
galaxies to distinguish between competing models for the formation of these
galaxies. The observational requirements for testing various formation models
are discussed, and the results of past and current studies are reviewed. The
conclusions of these studies are that most color distributions appear to have
two or more peaks, indicating an episodic formation history. This result is
consistent with previous predictions of merger models for the formation of
elliptical galaxies. Possibilities for improving these results in the future
are also presented.
