This chapter deals with 19 recent contributions from the literature, which aim to provide a systematic categorization of public policy resources (Meltsner, Clapham, Lapeyronnie, Lacam, Kiun, Davern, Lemieux, Newig, Söderlund, Blin, Sabatier & Weible, Hood & Margetts, Dowding, Vesan & Graziano, Sauer, Imbeau, Compston, Klüver and Dente). It concludes that all of the ten resources dealt with in the current book feature in this literature, that the value of resources is relative, and that the contributions by Dente, Compston, Hude & Margetts are closest to mine while those of Söderland, Davers and Meltsner differ most significantly from it. The chapter insists on the exchangeability, transferability and objectivability of public action resources and rejects the inclusion in the definition of personal, individual characteristics of the actors, to whom such resources belong. Furthermore, it stresses the observation that not only public actors but also civil society actors have public action resources.