The term "aviation" traditionally refers to all activities with involvement of man-made flying devices, like aircrafts. The same term can also be used to refer to all people, regulatory bodies, and organizations that have something to do with these devices. Aviation operations are categorized into two: civil aviation and military aviation. Civil aviation will include all non-military flying which are categorized into general aviation and scheduled air transport. The scope of general aviation will include non-scheduled civil flying: commercial or private. This will include all business flights, private aviation, air charter, flight training, parachuting, hang gliding, and aerial photography. Military aviation, on the other hand, involves the use of all military aircrafts that are often part of a government's military arsenal. Undoubtedly, the aviation industry is a significant part in the lives of the millions of people who have the need to move from one place to another.