‘Attending’ considers the following questions: Why do some patients neglect things to their left after a stroke? Why does attending to something else decrease the feeling of pain? Why is it dangerous to use a mobile phone while driving? It shows that there is not a limit to the capacity of the brain system to take in information, but at any one time you are only interested in some of the information that is available. The anatomical systems that support functional systems in looking and attending are described along with how we locate and identify targets, how attention is focused and divided, and how inputs and outputs are processed during multitasking.