"The National Interagency Incident Management System (NIIMS), adopted by several federal, state, and local agencies in 1982, served as the basis for today's National Incident Management System (NIMS). Many similarities exist between the NIIMS and the NIMS; however, there are new, additional components of NIMS. NIIMS was designed to meet the challenges of wildland fire. The NIMS was designed to address the challenges of all hazards or terrorist events. In addition, there is increased emphasis on prevention and preparedness measures in NIMS. With the exception of the way the intelligence function is handled, the principles and concepts of NIMS ICS are the same as the NIIMS ICS. Under the NIMS ICS, the incident commander has flexibility in where to assign the intelligence and information function, e.g., command staff or operations. Following is an outline of the five components of the NIIMS and the six components of NIMS."
Federal Emergency Management Agency, http://www.fema.gov