(computer hardware) An electronic device that is outside the computer's system unit (external to the computer's enclosing case), but used by the computer to which it is connected, such as a printer or a scanner.

A contraceptive device consisting of a spiral or similar shape of plastic or metal inserted through the vagina into the uterus in order to prevent the implantation of a fertilized egg.

(computing) Software, usually supplied with the operating system or by a hardware manufacturer, that communicates between the operating system of a personal computer and a specific hardware device.

Any device designed for use with or relating to the lungs, such as the iron lung and medical ventilator, or any device used in the field of respiratory therapy.

Any device which generates or is powered by compressed air

(computing) Any device that formats and presents data for display to a user; examples include printers and video monitors

A hypothetical weapon (often a bomb) programmed to automatically be used in response to certain attacks, usually with very dire consequences (such as the annihilation of the world).

Alternative spelling of doomsday device

A device used in spacesuits and diving helmets to allow the wearer to equalize the pressure in their ears by performing the Valsalva maneuver inside the suit without using their hands to block their nose.

(computing) Any of many hardware devices that provide input (from a user or elsewhere) to a computer.