Aircraft manufacturers are companies that design, build, and sell airplanes and helicopters. They create various types of aircraft, including commercial airliners, military jets, and private planes. Some well-known manufacturers include Boeing, Airbus, and Lockheed Martin. These companies invest heavily in research and development to improve safety, efficiency, and environmental impact. The process of manufacturing aircraft involves multiple stages, including engineering, assembly, and testing. Manufacturers must adhere to strict regulations set by aviation authorities like the Federal Aviation Administration (FAA) and the European Union Aviation Safety Agency (EASA). This ensures that all aircraft meet safety and performance standards before they enter service.