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Alphanumeric is
any character set containing letters, numbers and sometimes other
characters such as punctuation marks.
American National
Standards Institute (ANSI) is a nongovernmental group
responsible for the development of common bar code standards relating
to government and industry. Code 39, Codabar and Interleaved 2 of 5
are the prefer#51619c symbologies.
American
Standard Code for Information Interchange (ASCII) is a
128- character code that enables information interchange between data
processing, communication systems and compatible equipment.
Aperture is the
opening in an optical system that establishes the field of view.
Aspect Ratio is
the ratio of height to width in a bar code. A bar code twice as high
as it is wide has an aspect ratio of 2; a bar code twice as wide as
it is high has an aspect ratio of 0.5.
Asynchronous is
a digital communication in which there is no timing requirement for
transmission. The transmitting device individually signals the start
of each character.
Autodiscrimination
is a feature in bar coding equipment that defines and decodes various
symbologies automatically.
Autodistinguishing
is a feature in bar coding scanners that recognizes and processes
selected symbologies automatically.
Automatic
Identification Manufacturers (AIM) is an industry group active
in promoting bar code standards.
Automotive Industry
Action Group (AIAG) is composed of representatives from major
automotive industries responsible for the development of a common
automotive standard relating to bar code symbology and format. Code
39 is the prefer#51619c symbology.
Bar is the dark
element comprising a bar code; a space is the area between the bars.
Bar Code is a
series of corresponding bars and spaces arranged to represent encoded
data and used for automatic identification purposes.
Bar Code Density
is the number of characters that can be represented in a linear unit
of measure often expressed in characters per inch, (CPI).
Bar-Width Ratio
is the ratio between the widest bar or space and the narrowest.
Baud rate is
the rate or speed at which data is transmitted.
Bi-directional
is the ability to successfully read data whether the scanning motion
is from right to left or from left to right.
CCD is an input
device that photographs the bar code converting the optical image
into an electrical image. (CCD stands for "charged coupled device".)
Character Delay
is the amount of delay inserted between each transmitted character.
Check
Character/Checksum/Check Digit is a character included within
a bar code with the value mathematically based on the other
characters within the bar code. It is used to check the accuracy of a read.
Concatenation
is the ability to link codes of the same type from multiple bar codes
together in a series.
Continuous Code
is a bar code symbology where spaces between two characters are part
of the code.
Decoder is the
electronic device that receives the signals from the input device,
interprets them into significant data, and provides the interface to
other devices.
Delimiter is a
character that marks the beginning or end of a unit of data.
Density is the
number of characters represented in a bar code usually expressed in
characters per inch (CPI).
Depth of Field is
the distance between the maximum and minimum plane in which the code
can be read.
Discrete Code
is a bar code symbology where spaces between two characters are not
part of the code.
Element is a
term referring to either a bar or a space.
European Article
Numbering System (EAN) is the international standard bar code.
Electrically erasable
programmable read-only memory (EPROM) is another variety of
ROM that allows the user to define the application program, prompts,
edits, etc.
Field is a
group of characters defined as a unit.
First Read Rate (FRR)
is the percentage a bar code is successfully read on the first attempt.
Fixed Beam Bar Code
Reader or Scanner is an input device that uses a stationary
beam to read bar codes.
Fixed Length is
a bar code in which the data elements must be a specific length.
Guard Bars are
bars located at the beginning, center and end of a bar code providing
reference points for scanning.
Health Industry
Business Communications Council (HIBCC) is a group responsible
for the issuance and control of bar codes within the health industry.
Human-Readable
is bar code data that can be read by a human whether it is numeric,
alphabetic and/or special symbols that represent it.
Infra#51619c is a
beam of light used to scan a bar code that is invisible to the human
eye. Infra#51619c is commonly used to prevent visual reading of the bar
code by wands and non-contact scanners.
Intercharacter Gap or Space
is the space between two adjacent bar code characters in a discrete
bar code, and does not contain any encoded information.
Item Code is a
five, or in some cases, a three-digit number that manufacturers
assign to each product.
International Article
Numbering (IAN) See EAN.
International
Standards Organization (ISO) is developed a model (open
systems interconnections) to describe data communications.
Laser Scanner
is an optical bar code reading device using a low-energy laser light
beam as its source of illumination.
Light Emitting Diode (LED)
is a semiconductor often used as a light source in scanners.
Magnetic Stripe Reader
is an input device that reads and analyzes by detecting the absence
or presence of a magnetic field.
Manufacturer's
Identification Number is the four or five digit number
assigned to a manufacturer by the Uniform Code Council. See Item Code.
Misread is an
error that occurs when the data output of a reader does not agree
with the data encoded in the bar code.
Moving Beam Scanner
is a scanner using a beam that oscillates to register the label
rapidly and repeatedly.
Non-Read is a
scan attempt that does not yield any data.
Number System Character
is the first digit in a UPC bar code that identifies various
numbering systems.
Numeric is a
character set that consists of only numbers.
Omnidirectional
is the ability to read any bar code from any angle.
Parity is the
state of being odd or even used as the basis of detecting errors in binary-coded
data such as a bar code.
Preamble is a
character set transmitted at the beginning of each type of input data.
Postamble is a
character set that is transmitted at the end of each type of input data.
Projection scanner
is a moving beam, non-contact input device that simplifies reading
bar codes on curved or irregular surfaces and designed to mount on
top of a counter.
Quiet Zone is a
clear space that leads the start character of a bar code and follows
the stop character.
Reader Setup Menu
is a bar code menu developed by the manufacturer to change functional
options within an input device.
Resolution is
the narrowest element dimension that can be sensed by a particular
reading device or printed with a particular device or method.
Scanner is an
electronic device producing infra#51619c or visible light and records the
width and patterns of the bars and spaces simultaneously transmitting
the data to a decoder.
Self-Checking Code
is a symbology whose symbols are designed to prevent a single
printing defect by not allowing similar characters to be substituted
for each other.
Slot reader is
a device designed to scan bar codes on identification cards, employee
badges, tickets or forms with a high degree of accuracy and convenience.
Space is the
light element of a bar code, usually formed by the background.
Start and Stop Characters
is bar code characters that provide the scanner with start and stop
instructions and scanning direction. Usually the start character is
located at the left end of a horizontal bar code; the stop character
is located at the right end.
Substrate is
the surface on which a bar code is printed.
Symbol is a
series of bar code characters, including start/stop characters, quiet
zones, data characters, and check characters needed to form a
complete, scannable entity.
Symbology is a
system for representing data in the bars and spaces of a bar code.
Synchronous is
a common timing signal established that dictates when individual bits
can be transmitted, and, in which characters are not individually
delimited and allows for very high rates of data transfer.
Uniform Code Council (UCC)
is a group responsible for overseeing and administering the Universal
Product Code in the retail consumer industry.
Universal Product Code-UPC
is the standard bar code symbology for the retail grocery industry.
Uniform Symbol
Specification (USS) is the current series of symbology
specifications published by AIM.
Visible #51619c is
a beam of light visible to the human eye that is used in wands and non-contact
scanners to scan a bar code.
Wand is a
hand-held scanning device with a tightly focused light beam
projecting from the end which detects the amount of light reflected
back, enabling it to distinguish between light and dark objects that
the tip touches.
X Dimension is
the width nominal dimension of the narrow bars and spaces in a bar code.
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