- Algorithm – The correct
mathematical calculation for producing Check Digits.
- Alphanumeric – The character set that contains letters,
digits, and most other symbols located over the digits as well as
punctuation characters found on most keyboards.
- Aperture – The opening in the scanner through which the
reflected light exits to "read" the bar code.
- Autodiscrimination – A feature of scanners that allows the
scanner to automatically distinguish between various symbologies.
- Bar – The darker, non-reflective element of the bar code.
- Bar code – An array of rectangular bars and spaces arranged
in a predetermined pattern following specific rules to represent
data.
- Bar code label – A label consisting of a bar code and other
human eye-readable information which is placed on an item or a
patron card for identification.
- Bar code scanner – A device used to identify and decode a
bar code symbol.
- Bi-directional – The ability to read data successfully,
whether the scanning direction is from left to right or right to
left.
- Character – A letter, digit, or symbol that is used as part
of the representation of data.
- Check Digit – A character included (usually at the end) of a
bar code which verifies, mathematically, the correct scan of the bar
code. (Also called Check character, Checksum, Mod10 Checkdigit, or
Modulus 10 Checkdigit).
- Clear area – A clear space, containing no printed material,
which precedes the start character of a bar code and follows the
stop character of a bar code. (Also called "Quiet Zone.") Plain,
clear space/quiet zone must be a minimum of 3/8" for proper reads.
- Codabar – A bar code format (symbology)
- Code39 (Code 3 of 9) – A bar code format (symbology)
- Contrast – The amount of difference in reflectance between
the dark bars and the light spaces on a bar code.
- Depth of Field – The minimum/maximum distance a bar code can
be read using a CCD or Laser scanner.
- Edge error/edge roughness – Irregularities in the average or
nominal edge of a bar code element due to printing.
- First-read rate – The percentage of successful reads the
first time a bar code is scanned.
- Human eye-readable – Information printed above or below the
bar code. Human-eye readable portions of the bar code do not have to
be encoded into the bar code itself. i.e. Header (Name of Library).
- Interleaved 2 of 5 – A bar code format (symbology).
- Laser scanner – An optical bar code scanning device using a
low-energy laser as its source of light. Laser scanners have the
best read rate of all types of scanners.
- Lightpen – A pen-like contact scanner that is handheld and
is used to decode a bar code symbol. (Also called a wand).
- OCR – Optical character recognition. A system that can scan
human-eye readable text and transform the scanned information into
an acceptable form for the computer to interpret.
- Quiet Zone – A clear space, containing no printed material,
which precedes the start character of a bar code and follows the
stop character of a bar code. (Also called "Clear area.") Plain,
clear space/quiet zone must be a minimum of 3/8" for proper reads.
- Read rate – The percentage of correct readings that will be
obtained in one pass of the scanner over the bar code.
- Space – The light, reflective element of a bar code.
- Start character – A special keyboard character that is used
to identify the beginning of a bar code.
- Stop character – A special keyboard character that is used
to identify the end of a bar code.
- Void – The absence of ink within printed bars; a printing
error which can cause the bar with the void to scan as a space.
- Wand – A pen-like contact scanner that is handheld and is
used to decode a bar code symbol. (Also called a lightpen).
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