Table of Contents
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Aperture
ASCII
Autodiscrimination
Bar
Bar Code Density
Bar Height
Bar Width
Baud Rate
Bit
Byte
Glossary
The opening in an optical system defined by a lens or baffle that
establishes the field of view.
American Standard Code for Information Interchange. A 7 bit-plus-
parity code representing 128 letters, numerals, punctuation marks,
and control characters. It is a standard data transmission code in the
U.S.
The ability of an interface controller to determine the code type of a
scanned bar code. After this determination is made, the information
content can be decoded.
The dark element in a printed bar code symbol.
The number of characters represented per unit of measurement
(e.g., characters per inch).
The dimension of a bar measured perpendicular to the bar width.
Thickness of a bar measured from the edge closest to the symbol start
character to the trailing edge of the same bar.
A measure of the data flow or number of signaling events occurring
per second. When one bit is the standard "event," this is a measure of
bits per second (bps). For example, a baud rate of 50 means
transmission of 50 bits of data per second.
Binary digit. One bit is the basic unit of binary information. Generally,
eight consecutive bits compose one byte of data. The pattern of 0 and
1 values within the byte determines its meaning.
On an addressable boundary, eight adjacent binary digits (0 and 1)
combined in a pattern to represent a specific character or numeric
value. Bits are numbered from the right, 0 through 7, with bit 0 the
low-order bit. One byte in memory can be used to store one ASCII
character.
Glossary -1
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