NOAA's National Centers for Environmental Information (NCEI) are responsible for hosting and providing public access to one of the most significant archives for environmental data on Earth with over 20 petabytes of comprehensive atmospheric, coastal, oceanic, and geophysical data. NCEI headquarters are located in Asheville, North Carolina. Most employees work in the four main locations, but apart from those locations, NCEI has employees strategically located throughout the United States. The main locations are Cooperative Institute for Climate and Satellites–North Carolina (CICS-NC) at Asheville, North Carolina, Cooperative Institute for Research in Environmental Sciences (CIRES) at Boulder Colorado, Cooperative Institute for Climate and Satellites–Maryland (CICS-MD) at Silver Spring Maryland and Stennis Space Center, Mississippi.