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 IT services and solutions; and Digital Modernization and transformation services. The Health & Civil segment offers air traffic control systems; health mission software; managed health services; site-wide infrastructure management and operation; product and logistical support services; 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, technical and financial consulting, and software and application development; people scanners, computed tomography carry-on baggage scanners, checked baggage scanners, and explosive trace detectors; mobile non-intrusive inspection systems; open-architecture platform that transforms airport security by integrating disparate devices and technologies into a unified management system; biometric and smart border protection systems; IT service management and transformation programs; and aerial border surveillance and search-and-rescue operation services.