This course introduces Multiagency Coordination (MAC) Systems as described in the National Incident Management System (NIMS), and shows how these systems can be used to improve incident response. MAC Systems consist of a combination of elements: personnel, procedures, protocols, business practices, and communications integrated into a common system. After taking this course, you should be able to improve the overall coordination with, and support for, incident management by developing and operating within MAC Systems. While this course discusses the Incident Command System (ICS), it is not a substitute for ICS 400, Advanced ICS Command and General Staff — Complex Incidents.