 When one perceives or remembers that he is out of coffee, his brain state possesses intentionality or “aboutness”. The percept or memory is about one’s being out of coffee; it represents one as being out of coffee. The representational state has content. A psychosemantics seeks to explain what it is for a representational state to be about something, to provide an account of how states and events can have specific representational content. A physicalist psychosemantics seeks to do this using resources of the physical sciences exclusively. Neurophilosophers have contributed to two types of physicalist psychosemantics: the Functional Role approach and the Informational approach. For a description of these and other theories of mental content, see the entries on  causal theories of mental content,  mental representation, and  teleological theories of mental content.