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Analog-to-Digital
Converter
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Device in a scanner that
converts analog shades and intensity of colors into
numerical values for use in a computer. Also known as ADC
or A/D Converter.
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| A:\ |
Driver
letter designation most commonly given with the main floppy
disk drive in a computer. |
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A3
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Paper size for documents measuring up
11.7" x 17".
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A4
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Paper size for documents measuring up
to 8.27" x 11.69".
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A5
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Paper size for documents measuring up
to 5.83" x 8.28".
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Acquire
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Command used to open the TWAIN
interface in most image editing programs. Usually found in
the File menu.
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Additive Primaries
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Red, green and blue light combined to
make white light. All other colors can be made from various
combined amounts of red, green and blue light. In computers,
red, green and blue are used to create the colors available
in the 24-bit true color palette.
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Acrobat Reader
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Application by Adobe Systems, Inc.,
used for viewing PDF (portable document format) files. PDF
files are electronic versions of manuals and other documents
that include fonts and illustrations. They can be read
on-screen or printed out.
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Aliasing
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Jagged edges in images caused by sharp
contrast between the adjacent pixels.
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America Online
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Popular on-line service offering chat
rooms, e-mail and internet connections.
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Anti-aliasing
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Technique in imaging programs used to
blend hard-edged objects together with the background to
prevent aliasing.
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Apple Menu
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On a Macintosh, the menu in the
upper-left corner of the designated by an icon resembling
Apple’s rainbow-striped apple logo. The Apple Menu is
where common tasks are located.
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Apple System Profiler
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System tool on Macintosh computers
using System Software 7.6 or up. The Apple System Profiler
shows system components and device status.
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Application Software
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Computer programs designed to aid in a
task, such as image editing, optical character recognition
or word processing.
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Artifact
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An unwanted visual anomaly or defect
that degrades image quality.
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ASCII
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Acronym for American Standard
Code for Information Interchange. A
standard computer language that assigns a numerical code
value to characters, symbols and numbers. Can be used
between computer programs and platforms.
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ATM
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Acronym for Adobe Type
Manager. Adobe Systems, Inc. program for
improving the display of fonts at any size on a monitor.
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Attachment
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A file sent along with an e-mail
message.
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AVI
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Acronym for Audio Video
Interleaved. Multimedia file format for sound and
moving pictures. Files saved in this format have ".avi"
as a file extension.
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