Name Description
A2DP: A2DP (Advanced Audio Distribution Profile) is used for streaming stereo music wirelessly yp headphones or speakers over Bluetooth.
ABS Filament: Acrylonitrile  Butadiene Styrene (ABS), is a 3D filament that is commonly printed at 210-240 degrees C, with a heated bed of 80 degrees C or more. Requires controlled temperature unlike PLA.
Accelerated Graphics Port: An AGP is an interface specification that enables 3-D graphics to display quickly on ordinary personal computers.
Access Point An access point provides wireless access to a network. Devices connected to an access point can communicate with other devices on the network. They may also connect to the internet if the access point is linked to an internet connection.
Active X Active X is a Microsoft-based technology that was used to link desktop applications to the world wide web. Using Active X development tools, software developers an create interactive web content for their applications.
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\nExamples of these, are being able to see Word and Excel documents that are being viewed directly in your web browsers.
Afocal: Using a camera with its lens attached to take a picture though a telescope's eyepiece.
Ambient Light: Any light in the viewing room created by a source other than the projector or screen.
Amperage: A measure of electrical current flow, also called amps for short. It literally equates to the number of electrons in a conductor flowing past a certain point in a given amount of time.
Analog (Digital Imaging): Continuously varying information that represents an infinite number of values. Analog data is usually sampled in a discrete, finite number of steps before it is turned into digital data.
Analog Television: Analog Television refers to a video display device that receives and displays broadcast television signals that are transmitted utilizing technology that is similar to that used in standard radio transmissions. In fact, the video signal of analog television is transmitted in AM, while the audio is transmitted in FM.
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\nAnalog TV transmissions are subject to interference, such as ghosting and snow, depending on the distance and geographical location of the TV receiving the signal.
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\nIn addition, all analog television signals are transmitted in an interlaced format, in which all the odd lines in the image are transmitted first, then all even lines. These are referred to as fields. Two fields make up one frame of video image.
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Android: Andoid is Google's mobile operating system. It is used by several smartphones manufacturers like Samsung, LG, Motorola and more.
Aperature: The size of the opening that lets light into a camera lens, which can usually be adjusted and changed. In a telescope, the aperture is usually fixed, and is defined by the size of the primary mirror or objective lens.
Apple: Apple is a company that manufactures Macintosh computers, such as the iMac, MacPro, Mac mini, Macbook, Macbook Pro and Macbook Air. They are also known for their mobile devices, such as the iPad, iPod and iPhone.
Application: An application, or application program, is a software program that runs on your computer. Be it a windows-based or apple-based computer, the term "application" remains the same. Web browsers, e-mail programs, word processors, games, and utilities are all applications.
aptX: The aptX audio codec is a proprietary audio codec compression algorithm, which allows the real-time streaming of high quality stereo audio over a Bluetooth A2DP connection between a source device and the accessory device.
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\naptX technology must be incorporated in both the source and the accessory device for it to have any effect. Full backwards compatibility however allows audio streaming even when one of the devices is not aptX compatible, though in this case, the connection won't benefit from the technology.
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ARC: Audio Return Channel (ARC) is a very practical feature that has been introduced in HDMI ver1.4 and later versions. What this function allows, if both a home theater receiver and a TV have HDMI ver1.4 or later version connections, and offer this feature, is that you can transfer audio from the TV back to a home theater receiver and listen to your TV's audio through your home theater audio system instead of the TV's speakers without having to connect a second cable between the TV and home theater system.
Artifacts (Digital Imaging): Artificial, spurious defects in an image that were not part of the original image or data.
Aspect Ratio: Aspect Ratio represents the horizontal width of a television or projection screen in relation to it its vertical height. For example, a traditional analog television has a screen aspect ratio of 4x3, which means that for every 4 units in horizontal screen width, there are 3 units of vertical screen height. HDTV's have a an aspect ratio of 16x9, which means that for every sixteen units in horizontal
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\nIn cinematic terms, these ratios are expressed in the following manner: 4x3 is referred to as a 1.33:1 aspect ratio (1.33 units of horizontal width against 1 unit of vertical height) and 16x9 is expressed as a 1.78:1 aspect ratio (1.78:1 units of horizontal width against 1 unit of vertical height).
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ATSC: ATSC stands for Advanced Television Standards Committee. This organization is charged with organizing specifications and requirements for High Definition and Digital Television performance and broadcast standards. 
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\nAs a result of the ATSC's partnership with the FCC, all HDTVs manufactured for the U.S. market that include built-in tuners, have to adhere to the technical requirements of the ATSC, as approved by the FCC. As a result, HDTV tuners are referred to as ATSC tuners.
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AV Audio Video. Equipment and applications that deal with sound and sight.
AV Receiver: The AV receiver is the heart of a home theater system and provides most, if not all, the inputs and outputs that you connect everything, including your television, into. An AV Receiver provides a way of centralizing your home theater system.
AWG AWG stands for American Wire Gauge. It is the thickness of the wire inside the cable. The lower number AWG denotes thicker wiring and therefore a thicker cable overall.