Healthcare today is a team sport, no longer dominated by the vision of a single nurse or doctor interacting with a patient. Rather, modern healthcare occurs through a coordinated action of many individuals, possessing diverse skills and expertise, sometimes collocated but often distributed in time and space. Obvious examples of healthcare teams include a surgical team performing an operation, emergency department (ED) personnel stabilizing a trauma patient, a "code team" responding to in-hospital cardiac arrest, and daily bedside rounds by multi-disciplinary teams in an intensive care unit. Less obvious are examples of health professional communication and collaboration that do not occur face-to-face. For example, a nurse may notice unexpected symptoms in her patient during night-shift, contact a pharmacist to learn that this is a medication side effect, pass this information on verbally at shift report so other nurses can monitor the effects, record the information in the medical record for all clinicians to be aware of, and perhaps add a paper or electronic "post-it" note for the physician, suggesting a change of the medication order at morning rounds.In these contexts, electronic health records (EHR) and other health information technologies (HIT) can function in ways that support healthcare teams, becoming a