An electronic voice-amplification apparatus, usually containing a set of two loudspeakers and a central control unit, used for singing, giving a speech, play-by-play commentary at events, or broadcasting in public areas like in airports, stations, stations.

(computing) A system for representing numbers in which a radix of two is used; that is, each digit in a binary numeral may have either of two different values.

A huge complex of thunderstorms that can sometimes reach the size of Texas.

(automotive) A suspension system that automatically adjusts front and rear ride heights to compensate for changes in axle load.

(neuroanatomy) In vertebrates, that part of the nervous system comprising the brain, brainstem and spinal cord.

(neuroanatomy) The part of the nervous system which is not the central nervous system.

(neuroanatomy) In humans and other vertebrates, the part of the nervous system that regulates the involuntary activity of the heart, intestines and glands. These activities include digestion, respiration, perspiration, metabolism, and the modulation of blood pressure.

An electronic system used to store, process and display geographic information, especially maps

A navigation system that produces hyperbolic lines of position by the measurement of the difference in the time of reception, or the phase, of radio signals from multiple synchronized transmitters at fixed locations.

(aviation) A collection of radio navigation aids (always including a localizer and glideslope, and often one to three marker beacons as well) used by pilots for approach guidance to a specific airport runway, especially when visibility is limited.