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| AAC (Advanced Audio Coding) | An audio format
that is used by Apple in their iTunes software and store. This format has
digital rights management. It is a competitor to other audio formats like MP3.
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| Acrobat Reader | A program that views and prints information in its original format even
if a copy of the original program that created the information is not
available. Acrobat Reader can be a stand-alone program or plug-in to a
Web browser. It is a free program that reads files with a PDF extension
and can be downloaded from Adobe at www.adobe.com.
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| Acronym |
A word that is formed by combining parts or letters from the words they represent. For instance, modem is an acronym that is derived from MODulator/DEModulator. Often these are the first letters of each word of a long term. By strick standards the acronym that is formed has to be a pronouncable word. So radar and NATO are acronyms. In everyday jargon, however, other abbreviations like BTW (by the way) are sometimes considered acronyms.
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| Active X | A set of technologies developed by Microsoft that provides tools for creating interactive Web content and links desktop applications to the Internet. For instance, ActiveX technology allows users to view Word and Excel documents directly in a browser. |
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| Active-matrix | A set of technologies developed by Microsoft that provides tools for
creating interactive Web content and links desktop applications to the
Internet. For instance, ActiveX technology allows users to view Word
and Excel documents directly in a browser.
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| ADSL | (Asymmetrical Digital Subscriber Line) -- see DSL (Digital Subscriber Line) |
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| Ajax (Asynchronous JavaScript and XML) |
A suite of web development technologies
for creating web applications. Web sites created with Ajax usually have a high
degree of interactivity.
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| Alpha Testing | In-house testing of a software product. |
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| Analog | In an analog mechanism, data is represented by continuously variable physical quantities. An example is an analog clock with hands that move around the clock continuously producing a stream of time. |
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| Anti-virus Program |
A program that searches for
viruses and removes any virus that it finds. It is advisable to always have an
anti-virus program running on your PC. Be sure that it is updated regularly to
keep damaging viruses away from your computer.
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| Aperture | A small circular opening inside of the camera lens through which the light passes. The aperture is adjustable. The diameter can be changed to control the amount of light available to the camera’s sensor. The aperture size is usually calibrated in f-numbers. The larger the number, the smaller the lens opening.
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| API (Application Programming Interface) |
A set of rules that govern how
application use and exchange data. If an API is open, it allows web developers
to use it to develop new software application to go along with the original
program.
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| Application | Software designed for a certain use, such as word processing. Also called a program. |
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| ASCII (American Standard Code for Inform |
A set of 128 alphanumeric and
special control characters. These are used for character encoding based on the
English alphabet. Most foreign language characters and symbols are represented
by ASCII codes. These codes can be used to insert these characters and symbols
into word processing programs and email documents. For example,
To enter the degree sign while using Microsoft Word, place
the cursor into the document where you want the symbol to appear. Press the Num
Lock key, then hold down the ALT key while pressing the number 167(the ASCII
code for the degree sign.) When you release the ALT key, the cent sign will
appear in your document.
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| Aspect Ratio |
The aspect ratio of a two-dimensional
shape is the ratio of its longer dimension to its shorter dimension. The aspect
ratio of an older television is 4:3. High Definition televisions have an aspect
ratio of 16:9. In photography, the most common aspect ratios are 4:3 and 3:2.
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| Attachment | Any file linked to an e-mail message is called an attachment.
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| Auto Focus | Many of today’s cameras have an auto Focus feature that is activated by pressing the shutter release halfway down. When this is done, the camera focuses on a selected part of the picture subject and automatically calculates and sets the proper focus. The auto focus lag time is the time it takes to perform the function. If the lag time is too long, an action shot may be missed.
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| AutoCorrect | This
is a feature found in many programs, especially word processing applications.
AutoCorrect automatically corrects some spelling errors and replaces some text
with corrections that it thinks the user will want. In Microsoft Word, and many
other programs, the AutoCorrect is turned on by default. While most will find
it a useful feature, it can be turned off. The replacements that AutoCorrect
makes can also be user modified.
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| Avatar | A graphic representation of a real person in cyberspace |
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| AVI (Audio Video Interleave) |
A multimedia format that was created
by Microsoft. It is used in Microsoft Windows and is also commonly used for
video.
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