DRS Technologies offers mission-critical products and services that support military forces, intelligence agencies, and prime contractors. It has leading market positions in air combat training systems, combat display workstations, electronic sensors, environmental controls, flight recorders, rugged computers, communications systems, thermal imaging devices, and logistics support services. Most of its revenue is derived from the US government, primarily the US Department of Defense. DRS is a subsidiary of Italy's Leonardo - Finmeccanica and functions as part of its Defense and Security Electronics division.