In this overview of the key properties of globular cluster (GC) systems I show that the GCs in elliptical and spiral host galaxies have more in common than previously thought. After contrasting these properties I briefly comment on GC formation.
Extragalactic star clusters: proceedings of the 207th Symposium of the International Astronomical Union (IAU), Pucon, Chile, 12-16 March 2001 / Doug Geisler, Eva K. Grebel and Dante Minniti (eds.),
Vol. 207, pp. 238-244