Embraer S.A., together with its subsidiaries, designs, develops, manufactures, and sells aircraft and systems worldwide. It operates through Commercial Aviation; Defense & Security; Executive Aviation; Services & Support; and Other segments. The Commercial Aviation segment develops, produces, and sells commercial jets. Its Defense & Security segment develops and produces military aircraft and radars; and is involved in research and development of software and integrated information systems, communications, border monitoring and surveillance, space systems/satellites, and aircraft modernization services and services support, as well as command, control, communications, computer, intelligence, surveillance, and reconnaissance systems.