Aerospace comprises the atmosphere of Earth and surrounding space. Typically the term is used to refer to the industry that researches, designs, manufactures, operates, and maintains vehicles moving through this air and space. Aerospace is a very diverse field, with a multitude of commercial, industrial and military applications.
Aerospace is not the same as airspace, which is a term used to describe the physical air space directly above a location on the ground.
Defense or defence (see -ce/-se) may refer to:
The tactics and strategy of defending against attack:
* Defense (military)
* Defense (sport)
o Defender (football), a specialist defensive player in football (soccer)
o Defenceman (ice hockey), a specialist defensive player in ice hockey
* Defense (legal)
* Self-defense
* Civil defense
In politics and economics:
* National security
o Defence minister
* International security
* The defense industry
o Defense contractor, a company that provides defense-related services
Concepts in law:
* Self-defense (theory)
* Defense of property |
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