Businesses in airline manufacturing and flight control, among others, may hire students who have studied aviation. This field deals with the practical aspects of air travel, such as design, use and environmental impact. It also includes study in engineering and physics.

Russia (Russian: Россия) is by far the largest country in the world, covering more than one-eighth of the Earth's inhabited land area. The former State Committee for Higher Education in Russia financed 240 universities, academies and institutes, making Russia a solid country to study in.

Requirements for the PhD program often involve the student having already obtained a Master’s degree. Additionally, a thesis or dissertation primarily consisting of original academic research must be submitted. In some countries, this work may even need to be defended in front of a panel.