ABUS(August Bremicker Söhne KG) is a company based in Wetter-Volmarstein. It is a German manufacturer of preventative security technology as well as a market leader in bike locks. The name is an acronym formed from the original company name August Bremicker und Söhne.

An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft producing a second rotating magnetic field. The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings. Less commonly, linear AC motors operate on similar principles as rotating motors but have their stationary and moving parts arranged in a straight line configuration, producing linear motion instead of rotation.

AC power plugs and sockets are devices that allow electrically operated equipment to be connected to the primary alternating current (AC) power supply in a building. Electrical plugs and sockets differ in voltage and current rating, shape, size and type of connectors. The types used in each country are set by national standards, some of which are listed in the IEC technical report TR 60083, Plugs and socket-outlets for domestic and similar general use standardized in member countries of IEC. The scope of IEC TR 60083 states: "The report only contains systems for which standard sheets have been published in a National Standard, which may be a National Standard of the country itself or any other IEC member country". Plugs and sockets for portable appliances started becoming available in the 1880s, to replace connections to light sockets with easier to use wall-mounted outlets. A proliferation of types developed to address the issues of convenience and protection from electric shock. Today there are approximately 20 types in common use around the world, and many obsolete socket types are still found in older buildings. Co-ordination of technical standards has allowed some types of plugs to be used over wide regions to facilitate trade in electrical appliances, and for the convenience of travellers and consumers of imported electrical goods. Some multi-standard sockets allow use of several different types of plugs; improvised or unapproved adaptors between incompatible sockets and plugs may not provide the full safety and performance of an approved socket and plug combination.

The Academy Awards, also known as the Oscars, are a set of 24 awards for artistic and technical merit in the American film industry, given annually by the Academy of Motion Picture Arts and Sciences (AMPAS), to recognize excellence in cinematic achievements as assessed by the Academy's voting membership. The various category winners are awarded a copy of a golden statuette, officially called the "Academy Award of Merit", which has become commonly known by its nickname "Oscar". The sculpture was created by George Stanley. The awards, first presented in 1929 at the Hollywood Roosevelt Hotel, are overseen by AMPAS. The awards ceremony was first broadcast on radio in 1930 and televised for the first time in 1953. It is now seen live in more than 200 countries and can be streamed live online. The Academy Awards ceremony is the oldest worldwide entertainment awards ceremony. Its equivalents – the Emmy Awards for television, the Tony Awards for theater, and the Grammy Awards for music – are modeled after the Academy Awards. The 90th Academy Awards ceremony, honoring the best films of 2017, was held on 4 March 2018, at the Dolby Theatre, in Los Angeles, California. The ceremony was hosted by Jimmy Kimmel and was broadcast on ABC. A total of 3,072 Oscars have been awarded from the inception of the award through the 90th.

Accuride Corporation (Indiana), an unrelated company, is a manufacturer of vehicle wheels.Accuride International Inc. is a manufacturer of commercial-grade drawer slides, linear track systems, and electronic locking solutions for cabinetry in commercial, residential and industrial applications, based in Santa Fe Springs, California and has about 2000 employees.Accuride components can be found in major appliances, electronic enclosures, automobiles, office and residential fixtures, and industrial hardware. Accuride currently holds nearly 400 enforceable patents related to movement and access control solutions worldwide. The company is headquartered in Santa Fe Springs, Calif., and has manufacturing facilities in North America, Europe, and Asia. Accuride has about 1,000,000 square feet of manufacturing space in China, Germany, Japan, Mexico, the UK, and the US. Its manufacturing plant in Charlotte, North Carolina, United States closed in 2001.

Accutone Technologies Limited is a manufacturer and marketer of telephone headsets for call centers, and premium-grade consumer audio headphones for smartphones and music-playing devices. A UK brand with headquarters in Spain, Mexico, Hong Kong, and manufacturing facilities in China, Accutone also builds ODM headsets for UK telecom companies, as well as telco in S.America and US. Its mother company started out manufacturing loudspeakers in 1969, Accutone has been in the field of electro-acoustics for more than 45 years. Aside from being one of the big four business headset brand globally, Accutone has begun building a wide range of pro-grade audio headphones for consumers since 2011.

An ace is a playing card. In the standard French deck, an ace has a single suit symbol (a heart, diamond, spade, or club) located in the middle of the card, sometimes large and decorated, especially in the case of the ace of spades. This embellishment on the ace of spades started when King James VI of Scotland and I of England required an insignia of the printing house to be printed on the ace of spades. This insignia was necessary for identifying the printing house and stamping it as having paid the new stamp tax. Although this requirement was abolished in 1960, the tradition has been kept by many card makers. In other countries the stamp and embellishments are usually found on ace cards; clubs in France, diamonds in Russia, and hearts in Genoa because they have the most blank space. The word "ace" comes from the Old French word as (from Latin 'as') meaning 'a unit', from the name of a small Roman coin. It originally meant the side of a die with only one pip, before it was a term for a playing card. Since this was the lowest roll of the die, it traditionally meant 'bad luck' in Middle English, but as the ace is often the highest playing card, its meaning has since changed to mean 'high-quality, excellence'.

The 3D ACIS Modeler (ACIS) is a geometric modeling kernel developed by Spatial Corporation (formerly Spatial Technology), part of Dassault Systemes. ACIS is used by many software developers in industries such as computer-aided design (CAD), computer-aided manufacturing (CAM), computer-aided engineering (CAE), architecture, engineering and construction (AEC), coordinate-measuring machine (CMM), 3D animation, and shipbuilding. ACIS provides software developers and manufacturers the underlying 3D modeling functionality. ACIS features an open, object-oriented C++ architecture that enables robust, 3D modelling capabilities. ACIS is used to construct applications with hybrid modeling features, since it integrates wireframe model, surface, and solid modeling functionality with both manifold and non-manifold topology, and a rich set of geometric operations.

The acorn nut is a type of fastener which gets its name from its shape. Acorn nut is its common name and it is also called a crown hex nut, blind nut, cap nut or domed cap nut. It is a nut that has a domed top to cover the threads. This is to prevent contact with the external thread to protect the threads or protect other things the threads would rub against. In addition the dome gives a more finished appearance. It is usually made of brass, steel, stainless steel (low carbon content) or nylon. It can also be chrome plated and given a mirror finish. There are two types of acorn nuts. One is low, or the standard acorn nut. The other is the high acorn nut. The high acorn nut is wider and higher and will protect extra long studs. There are also self-locking acorn nuts that have distorted threads in the hex area to create a tight friction fit to prevent the nut from vibrating loose. There are standards governing the manufacture of acorn nuts. One is Society of Automotive Engineers (SAE) Standard J483, High and Low Crown (Blind, Acorn) Hex Nuts. Another is Deutsches Institut für Normung (DIN) 1587, Hexagon Domed Cap Nuts.

An acoustic guitar is a guitar that produces sound acoustically—by transmitting the vibration of the strings to the air—as opposed to relying on electronic amplification (see electric guitar). The sound waves from the strings of an acoustic guitar resonate through the guitar's body, creating sound. This typically involves the use of a sound board and a sound box to strengthen the vibrations of the strings. The main source of sound in an acoustic guitar is the string, which is plucked or strummed with the finger or with a pick. The string vibrates at a necessary frequency and also creates many harmonics at various different frequencies. The frequencies produced can depend on string length, mass, and tension. The string causes the soundboard and sound box to vibrate, and as these have their own resonances at certain frequencies, they amplify some string harmonics more strongly than others, hence affecting the timbre produced by the instrument.