Leidos Holdings, Inc., together with its subsidiaries, provides services and solutions for government and commercial customers in the United States and internationally. The National Security & Digital segment provides national security software; services by using artificial intelligence and machine learning to coordinate sea, ground, air, and space to help warfighters; offensive, defensive, and physical cyber operation solutions; intelligence analysis, operational support, logistics operations, security, linguistics, force production, biometrics, chemical, biological, radiological, nuclear, and explosives, energetics, training, and other services; and Digital Modernization and transformation services. The Health & Civil segment offers air traffic control systems; health mission software; managed health services; infrastructure management and operation; logistical operations and information technology support; and life science research and development support services. The Commercial & International segment provides power grid engineering and design, grid modernization, utility planning and consulting, energy management and efficiency, technology-driven innovation, and software and application development; people scanners, computed tomography carry-on baggage scanners, checked baggage scanners, and explosive trace detectors; mobile, non-intrusive ports and borders inspection systems; and open-architecture platform that transforms airport security by integrating disparate devices and technologies into a unified management system. The Defense Systems segment offers air and missile defense, maritime, aerospace, and cyber and threat systems; offers airborne training, intelligence, surveillance, and reconnaissance missions; and provides space-based electro-optic infrared systems, multi/hyperspectral, electronic warfare and signals intelligence, and communications payloads. Leidos Holdings, Inc. was founded in 1969 and is headquartered in Reston, Virginia. collapse