ICS 200 is designed to enable personnel  to operate efficiently during an incident or event within the Incident Command  System (ICS). ICS-200 provides training on and resources for personnel who are  likely to assume a supervisory position within the ICS.
The Emergency Management Institute  developed ICS its ICS courses collaboratively with:

National Wildfire Coordinating Group (NWCG)U.S. Department of AgricultureUnited State Fire Administration's National Fire Programs Branch

Note: IS-200.b is an updated version of the IS-200  course. If you have successfully completed IS-200 or IS-200.a, you may want to  review the new version of the course. For credentialing purposes, the courses  are equivalent.

Link: http://training.fema.gov/EMIWeb/IS/courseOverview.aspx?code=IS-200.b