1. An automated, patient-controlled, medical and biographical records system comprising: a. a central computer connected to a global computer network; b. a centralized medical and biographical records database maintained at the central computer, said database including medical and biographical records for a plurality of individual patients, access to each of said medical and biographical records in the database being controlled by a corresponding individual patient of said plurality of patients, said central computer having a security program limiting access to the records to the patients and to health care professionals selectively authorized by the patients; c. one or more patient computers situated remotely from the central computer and connected to the global network, said patient computers each executing a software program interface for patients to input medical history and biographical information into the patient medical and biographical records database and to authorize health care professionals to access at least a portion of the records of the authorizing patients; and d. one or more health care computers situated remotely from the central computer and connected to the global network, said health care computers each having a software program interface for the authorized health care professionals to access the medical history and biographical information from the patient medical and biographical records database and to input additional patient medical history and biographical information into the patient medical and biographical records database.