TARA relies on three main references to reach its predictive conclusions. One is Intel's threat agent library, which defines eight common threat agent attributes and identifies 22 threat agent archetypes. The second is its common exposure library, which enumerates known information security vulnerabilities and exposures at Intel. Several publicly available common exposure libraries are also used to provide additional data. The third is Intel's methods and objectives library, which lists known objectives of threat agents and the methods they are most likely to use to accomplish these goals.