The United States Department of Defense has a large number of temporary military bases in Iraq, most a type of forward operating base (FOB). Depending on their size or utility, the installations were called: Camp, Forward Operating Base (FOB), Contingency Operating Base (COB), Contingency Operating Site (COS), Combat Outpost (COP), Patrol Base (PB), Outpost, Logistic Base (Log Base), Fire Base (FB), Convoy Support Center (CSC), Logistic Support Area (LSA) and Joint Security Station (JSS).