AGC Inc. (AGC株式会社, AGC kabushiki gaisha), formerly Asahi Glass Co., Ltd., is a Japanese global glass manufacturing company, headquartered in Tokyo. It is the largest glass company in the world and one of the core Mitsubishi companies. The company is listed on the Tokyo Stock Exchange and is a constituent of the TOPIX and Nikkei 225 stock indices. Asahi Glass was named one of Thomson Reuters Top 100 Global Innovators in 2013.

The Agena Target Vehicle (ATV), also known as Gemini-Agena Target Vehicle (GATV) was an unmanned spacecraft used by NASA during its Gemini program to develop and practice orbital space rendezvous and docking techniques, and to perform large orbital changes, in preparation for the Apollo program lunar missions. The spacecraft was based on Lockheed Aircraft's Agena-D upper stage rocket, fitted with a docking target manufactured by McDonnell Aircraft. The combined spacecraft was a 26-foot (7.92 m)-long cylinder with a diameter of 5 feet (1.52 m), placed into low Earth orbit with the Atlas-Agena launch vehicle. It carried approximately 14,021 to 14,054 pounds (6,360 to 6,375 kg) of propellant and gas at launch, and had a gross mass at orbital insertion of 7,117 to 7,271 pounds (3,228 to 3,298 kg). The ATV for Gemini 6 failed on launch on October 25, 1965, which led NASA to develop the Augmented Target Docking Adapter (ATDA) as a backup, a smaller spacecraft consisting of the docking target fitted with an attitude control propulsion system, but lacking the Agena orbital change rocket. The ATDA was used once on Gemini 9A after a second ATV launch failure on May 17, 1966, but failed as a docking target because its launch shroud failed to separate.

Aggregate Industries, a member of LafargeHolcim, is a company based in the United Kingdom with headquarters at Bardon Hill, Coalville, Leicestershire. Aggregate Industries manufactures and supplies a range of heavy building materials, primarily aggregates such as stone, asphalt and concrete, to the construction industry and other business sectors. Aggregate Industries also manufactures and imports cement, and provides a range of aggregate-associated goods and services, these include the manufacture of masonry and reconstructed stone items for construction industry and domestic applications, the manufacture of pre-cast concrete items, the supply of ready mixed concrete, design and project management consulting, and resurfacing contracting services. Aggregate Industries operates more than 60 quarries in the UK and has several bases throughout mainland Europe and Scandinavia. Its clients operate in a range of services including construction, aviation, education, horticulture, road building, housing, power and energy and rail.

Agile Software Corporation, was a San Jose, California based company that provided product lifecycle management (PLM) software. In February, 2005, Agile Software Corporation acquired Cimmetry Systems Corporation, a privately owned software developer specializing in enterprise visualization, for approximately US$41.5 million in cash. Cimmetry Systems Corporation became a wholly owned subsidiary of Agile Software Corporation. Agile Software Corporation operated as a public company, with shares trading on NASDAQ. On 15 May 2007, Oracle Corporation announced that it would acquire Agile Software Corporation through a cash merger for US$8.10 per share, or approximately US$495 million. On July 16, 2007, Oracle Corporation completed the acquisition of Agile, which became a wholly owned subsidiary.

Agilent Technologies, Inc. is an American public research, development and manufacturing company established in 1999 as a spin-off from Hewlett-Packard. The resulting IPO of Agilent stock was the largest in the history of Silicon Valley at the time.The company provides analytical instruments, software, services and consumables for the entire laboratory workflow. Agilent focuses its products and services on six markets: food, environmental and forensics, pharmaceutical, diagnostics, chemical and energy, and research. From 1999 to 2014, the company also produced test and measurement equipment for electronics; that division was spun off to form Keysight.

The AGM-114 Hellfire is an air-to-surface missile (ASM) first developed for anti-armor use, but later models were developed for precision strikes against other target types, and have been used in a number of targeted killings of high-profile individuals. It was originally developed under the name Heliborne, Laser, Fire and Forget Missile, which led to the colloquial name "Hellfire" ultimately becoming the missile's formal name. It has multi-mission, multi-target precision-strike ability, and can be launched from multiple air, sea, and ground platforms, including the Predator drone. The Hellfire missile is the primary 100-pound (45 kg) class air-to-ground precision weapon for the armed forces of the United States and many other nations.

Agriculture is the science and art of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. The history of agriculture began thousands of years ago. After gathering wild grains beginning at least 105,000 years ago, nascent farmers began to plant them around 11,500 years ago. Pigs, sheep and cattle were domesticated over 10,000 years ago. Plants were independently cultivated in at least 11 regions of the world. Industrial agriculture based on large-scale monoculture in the twentieth century came to dominate agricultural output, though about 2 billion people still depended on subsistence agriculture into the twenty-first. Modern agronomy, plant breeding, agrochemicals such as pesticides and fertilizers, and technological developments have sharply increased yields, while causing widespread ecological and environmental damage. Selective breeding and modern practices in animal husbandry have similarly increased the output of meat, but have raised concerns about animal welfare and environmental damage. Environmental issues include contributions to global warming, depletion of aquifers, deforestation, antibiotic resistance, and growth hormones in industrial meat production. Genetically modified organisms are widely used, although some are banned in certain countries. The major agricultural products can be broadly grouped into foods, fibers, fuels and raw materials (such as rubber). Food classes include cereals (grains), vegetables, fruits, oils, meat, milk, fungi and eggs. Over one-third of the world's workers are employed in agriculture, second only to the service sector, although the number of agricultural workers in developed countries has decreased significantly over the centuries.

Air bearings (also known as aerostatic or aerodynamic bearings) are bearings that use a thin film of pressurized gas to provide a low friction load-bearing interface between surfaces. The two surfaces do not touch, thus avoiding the traditional bearing-related problems of friction, wear, particulates, and lubricant handling, and offer distinct advantages in precision positioning, such as lacking backlash and static friction, as well as in high-speed applications. A differentiation is made between aerodynamic bearings, which establish the air cushion through the relative motion between static and moving parts, and aerostatic bearings, in which the pressure is being externally inserted. Gas bearings are being mainly used in precision machinery tools (measuring and processing machines) and high-speed machines (spindle, small-scale turbomachinery).

An air brake or, more formally, a compressed air brake system, is a type of friction brake for vehicles in which compressed air pressing on a piston is used to apply the pressure to the brake pad needed to stop the vehicle. Air brakes are used in large heavy vehicles, particularly those having multiple trailers which must be linked into the brake system, such as trucks, buses, trailers, and semi-trailers in addition to their use in railroad trains. George Westinghouse first developed air brakes for use in railway service. He patented a safer air brake on March 5, 1872. Westinghouse made numerous alterations to improve his air pressured brake invention, which led to various forms of the automatic brake. In the early 20th century, after its advantages were proven in railway use, it was adopted by manufacturers of trucks and heavy road vehicles.

An air burst or airburst is the detonation of an explosive device such as an anti-personnel artillery shell or a nuclear weapon in the air instead of on contact with the ground or target or a delayed armor-piercing explosion. The principal military advantage of an air burst over a ground burst is that the energy from the explosion (as well as any shell fragments) is distributed more evenly over a wider area; however, the peak energy is lower at ground zero. Air burst may also refer to naturally occurring explosion of meteors in atmosphere, as happened for example in the Tunguska event and the Chelyabinsk meteor.