** Compressed natural gas.

** An Introduction to Compressed Audio with Vorbis

** Compressed gas can be stored, allowing the use of machines when electrical power is lost.

** Fuel CNG ( Compressed Natural Gas )

** Armed with the new backpack Compressed Air Foam, these firebikes are capable of extinguishing fires such as household fire and vehicle fire.

** The latest Generation E of the PL features the latest Compressed Air Foam System technology as well as a dedicated hasty decontamination facility.

** Air fans ( hovercraft, air boat )

** Automobile air conditioning, air conditioning in a vehicle

** Solar air conditioning, air conditioning using solar power

** Ice storage air conditioning, air conditioning using ice storage

** Atmospheric dispersion modeling, mathematical simulation of how air pollutants disperse in the ambient atmosphere

** Diego and Jaquez in The Castle of Otranto – they appear to talk about random things, and argue foolishly with each other in order to lighten the air of the novel.

** Decreased concentration of oxygen in inspired air.

** In the Star Trek: Enterprise episodes " Demons " and " Terra Prime " ( both 2005 ) it is revealed that Mars is in the process of being terraformed by use of the Verteron array which redirects comets to crashland on the planet's surface ; by 2155 the atmosphere had been sufficiently altered so that, in the lowlands, Humans could breathe the air unassisted, though temperatures were still cold enough to require thermal gear.

** Republic Airlines, a regional air carrier affiliated with US Airways

** Cryogenic liquid air or nitrogen

** The terrestrial region, according to Aristotle, consisted of concentric spheres of the four elements — earth, water, air, and fire.

** The open flute family, in which the player's lips form a stream of air that goes directly from the players lips to the edge, such as transverse flutes and end-blown flutes.

** The closed flute family, in which the musical instrument has a channel to form and direct the air stream over an edge.

** Bertrand Piccard and Brian Jones become the first to circumnavigate the Earth in a hot air balloon.

** NATO launches air strikes against the Federal Republic of Yugoslavia.

** In 1999, the North Atlantic Treaty Organization ( NATO ) led by the United States launched air attacks against Yugoslavia ( then composed of only Serbia and Montenegro ) to pressure the Yugoslav government to end its military operations against ethnic Albanian separatists in Kosovo due to accusations of war crimes being committed by Yugoslav military forces working alongside nationalist Serb paramilitary groups.

** An air crash in Indonesia ( likely caused by smoke rising from numerous forest fires in the area ) kills 235 people ( see Garuda Indonesia Flight 152 ).

** The Japanese Navy launches an air raid on Trincomalee in Ceylon ( Sri Lanka ); the Royal Navy aircraft carrier and Royal Australian Navy destroyer are sunk off the country's East Coast.

** ( 12: 30 a. m .) – B-17 Flying Fortress air crash near Auckland.

** Carole Lombard, American actress ( air crash ) ( b. 1908 )

** WWII: The British House of Commons is damaged by the Luftwaffe in an air raid.

** Psionic Blasts: the ability to emit blasts of psionic energy which don't harm its victims physically but mentally instead.

** Thermodynamics, the study of the relationships between heat and mechanical energy

** Discharger, an electrical device that releases stored energy

** Lactic acid fermentation, the biological process by which sugars such as glucose, fructose, and sucrose, are converted into cellular energy and the metabolic byproduct lactate

** Motion, position, and energy

** Energy source the transfer of energy from one source, to work in another.

** Superconducting magnetic energy storage ( SMES )

** Flywheel energy storage

** Hydroelectric energy storage

** Gravitational potential energy ( device )

** Conventional: Chemicals such as gunpowder and high explosives store significant energy within their molecular bonds.

** Nuclear: A runaway nuclear fission or nuclear fusion reaction causes immense energy release.

** Universally a general lack of energy

** Universally a general lack of energy

** Electronic media, communications delivered via electronic or electromechanical energy

** Coupling loss, the loss that occurs when energy is transferred from one circuit, optical device, or medium to another

** Straw may be fed as part of the roughage component of the diet to cattle or horses that are on a near maintenance level of energy requirement.

** The use of straw as a carbon-neutral energy source is increasing rapidly, especially for biobutanol.

** Internal fan-cooled electric motor, an electric motor that is self-cooled by a fan, typically used for motors with a high energy density

** Synthetic molecular motor, molecular machines capable of rotation under energy input

** Phonon-phonon scattering, a phonon breaking into two lower energy phonons or a phonon colliding with another phonon and merging into one higher energy phonon.

** Fluorescence, photoluminescence in which the emitted photons are of lower energy than those absorbed

** Repairing and modernizing public housing, including increasing the energy efficiency of units, $ 4 billion to the Department of Housing and Urban Development ( HUD )