Alcoa Inc. (Alcoa) is engaged in the production and management of primary aluminum, fabricated aluminum, and alumina combined, through its participation in technology, mining, refining, smelting, fabricating, and recycling. Alcoa's products are used worldwide in aircraft, automobiles, commercial transportation, packaging, building and construction, oil and gas, defense, consumer electronics, and industrial applications. Alcoa is a global company operating in 31 countries. Alcoa's operations consist of four worldwide reportable segments: Alumina, Primary Metals, Flat-Rolled Products, and Engineered Products and Solutions. On March 9, 2011, Alcoa completed an acquisition of the aerospace fastener business of TransDigm Group Inc.