Elbit Systems Limited. The Company's principal activities are upgrading of existing airborne, ground and naval defense platforms, development, manufacture, integration and marketing of advanced integrated defense electronics systems and subsystems. It operates through the following divisions: airborne systems - aircraft and helicopter upgrades for airborne and ground military platforms; armored vehicle systems; command, control and communication systems; electro-optical systems and other. Airborne systems accounted for 45% of 2002 revenues; electro-optical systems, 18%; armored vehicle systems, 16%; command, control and communication systems, 15% and other, 6%.