Rolls-Royce Holdings PLC is a United Kingdom-based engineering company. The Company is focused on power and propulsion systems. Its segments include Civil Aerospace, which is engaged in the development, manufacture, marketing and sales of commercial aero engines and aftermarket services; Defence Aerospace, which is engaged in the development, manufacture, marketing and sales of military aero engines and aftermarket services, and caters to sectors, including combat aircraft, trainer aircraft and helicopters; Power Systems, which is engaged in the development, manufacture, marketing and sales of reciprocating engines and power systems. Power Systems provides power solutions and complete life-cycle support under product and solution brand MTU systems.