L3 is a leading provider of a broad range of communication and electronic systems and products used on military, homeland security and commercial platforms. L3 is also a prime contractor in aerospace systems, security and detection systems, and pilot training.

L3 is composed of four business segments:

• Aerospace Systems delivers integrated solutions for the global ISR market and provides modernization, upgrade, sustainment, and maintenance and logistics support for a wide variety of aircraft and ground systems.
• Electronic Systems provides a broad range of components, products, subsystems, systems and related services for military and commercial customers.
• Communication Systems delivers products and services for the global communications market, specializing in strategic and tactical airborne, space, ground and sea-based communication systems.
• National Security Solutions provides cybersecurity solutions, high-performance computing, enterprise IT services, analytics and intelligence analysis.