A critical aspect of many simulation studies is the modeling of resources. A general typology, or multidimensional categorization, is proposed for characterizing resources. Such a characterization, or resource "profile," serves as a "meta-model" from which relevant properties may be identified and incorporated into a resource model. The typology is applicable across domains and is illustrated by example profiles of a mechanical resource (a tank), an electronic resource (a web service), and a living resource (an oilfield employee).