Elbit Systems Ltd. operates as an international high technology company. The firm develops and supplies a portfolio of airborne, land and naval systems and products for defense, homeland security and commercial aviation applications. Its systems and products are installed on new platforms, and it also performs platform modernization programs. In addition, it provides a range of support services. The firm's activities include military aircraft and helicopter systems; helmet mounted systems; commercial aviation systems and aerostructures; unmanned aircraft and unmanned surface vessels; land vehicle systems; command, control, communications, computer and intelligence (C4I) systems; intelligence and cyber systems; electro-optic and countermeasures systems; electronic warfare and signal intelligence systems, and various commercial activities. The company operates primarily in the defense and homeland security arenas.