COMPANIES

Hughes Lands Big Contract: Hughes Aircraft Co. said it won an $837-million contract to build a new air defense system for Saudi Arabia, the largest award ever received by its Fullerton division. Scheduled for completion in the mid-1990s, the system would mesh software programs, commercial computers and military display systems to enhance Saudi Arabia’s air defense. It would warn the Saudis of incoming enemy aircraft and would interact with software programs that track Scud missiles and similar weapons.