Rockwell Automation 2755-G6-D Scanner with RS-232 Option - Manual (Page 96)

A–B
Glossary
G–1
ACK: See acknowledgement.
acknowledgement (ACK): An ASCII control character
used to acknowledge the reception and acceptance of a
transmission block.
AIM: Acronym for Automatic Identification
Manufacturers.
alphanumeric: The character set containing letters,
numbers, punctuation marks, and symbols.
ASCII: American Standard Code for Information
Interchange. It is a seven-bit code with an optional parity
bit used to represent alphanumerics, punctuation marks,
and control codes.
bar: The dark element of a printed symbol.
bar code: The parallel bars and spaces found in a bar
code symbol.
bar code density: The number of characters which can be
represented in a linear inch.
bar code label: A label that carries a bar code and is
suitable to be affixed to an article.
bar code symbol: A group of parallel bars that represent
a character or group of characters whose spacing is
determined by a specific set of rules. In most cases,
human readable characters are printed below the bars.
bar length: The bar dimension perpendicular to the
bar width.
bar width: The thickness of a bar measured from the
edge closest to the symbol’s start character to the trailing
edge of the same bar.
baud: A unit of signaling speed equal to the number of
discrete conditions or signal events per second.
character: A single group of bars and spaces representing
an individual number, letter or punctuation mark. A
graphic shape representing a letter, number or symbol.