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gun control

(Encyclopedia)gun control, government limitation of the purchase and ownership of firearms. The availability of guns is controlled by nations and localities throughout the world. In the United States the “right o...

gun

(Encyclopedia)gun, in general, any weapon that discharges shot, shells, or bullets by the explosion of gunpowder or some other explosive from a straight tube. See firearm; artillery; small arms. ...

stun gun

(Encyclopedia)stun gun, hand-held electronic device that produces a high-voltage pulse that can immobilize a person for several minutes with no permanent damage in most cases. It is powered by ordinary batteries, w...

machine gun

(Encyclopedia)machine gun: see small arms.

control surface

(Encyclopedia)control surface: see airfoil.

control systems

(Encyclopedia)control systems, combinations of components (electrical, mechanical, thermal, or hydraulic) that act together to maintain actual system performance close to a desired set of performance specifications...

rent control

(Encyclopedia)rent control, in economics and law, government regulation of rent to prevent unreasonable or excessive increases. In the United States, the federal government imposed rent control (and other price con...

numerical control

(Encyclopedia)numerical control: see computer-aided manufacturing. ...

birth control

(Encyclopedia)birth control, practice of contraception for the purpose of limiting reproduction. Although contraceptive techniques had been known in ancient Egypt, Greece, and Rome, the modern movement for birth ...

National Rifle Association of America

(Encyclopedia)National Rifle Association of America (NRA), group founded (1871) to promote shooting, hunting, firearm safety, and wildlife conservation. The NRA has more than 3 million members. The association spon...