As hospitals and health systems continue to integrate electronic medical record (EMR) systems into their facilities, it might be helpful for these institutions to know a few facts about two of America's top EMR behemoths. It should come as no surprise that Epic and Cerner continue to dominate the electronic health information market. They are by far two of the best-known companies offering EMR solutions; and, though other up-and-coming companies offer similar systems and services, it may be a while before they can catch up to the competition.