Leidos (formerly known as Science Applications International Corporation, SAIC) is a science, engineering, and information technology company that provides services and solutions in the defense, intelligence, civil, and health markets. It operates through three segments: Defense Solutions, Civil, and Health. The Defense Solutions segment offers surveillance and reconnaissance products, such as airborne and ground ISR (intelligence, surveillance, reconnaissance), maritime, electronic warfare, distributed sensor, and autonomous systems, as well as multi-spectral, airborne, ground and maritime ISR collection and processing systems, sensor design, command and control solutions, and training systems. The Civil segment provides aviation solutions, security products, digital transformation services, as well as federal environment and infrastructure and logistics solutions. The Health segment delivers complex systems integration, managed health services, digital transformation, and life sciences research and development solutions.