Have you ever wanted to calculate the predicted peak flow for one of your asthmatic patients without spending valuable minutes searching for that confounded little slide rule gizmo? Wouldn t it be great if you could somehow remember all Mrs. Jones medications when the nursing home calls to see if it s OK to treat her acutely elevated blood pressure with some atenolol?

Handheld computers are emerging as the stethoscopes of the twenty-first century, and no clinician should be without this essential tool. These small, easy-to-use devices are now powerful enough to help clinicians...