PRODUCT REFERENCE GUIDE
197
GLOSSARY
AIM
(Association for Automatic Identification and Mobility): AIM Global is the international
trade association representing automatic identification and mobility technology solu-
tion providers.
AIM DPM Quality Guideline
Standard applicable to the symbol quality assessment of direct part marking (DPM) per-
formed in using two-dimensional bar code symbols. It defines modifications to the mea-
surement and grading of several symbol quality parameters.
Barcodes (1D Codes)
A pattern of variable-width bars and spaces which represents numeric or alphanumeric
data in machine-readable form. The general format of a barcode symbol consists of a
leading margin, start character, data or message character, check character (if any), stop
character, and trailing margin. Within this framework, each recognizable symbology
uses its own unique format.
BIOS
Basic Input Output System. A collection of ROM-based code with a standard API used to
interface with standard PC hardware.
Bit
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.
Bits per Second (bps)
Number of bits transmitted or received per second.
Bright Field Illumination
Lighting of surfaces at high (narrow) angles used to provide maximum reflection of the
light to the reader’s lens. This is effective on surfaces that absorb light or are not highly
reflective and also on low contrast codes.
Byte
On an addressable boundary, eight adjacent binary digits (0 and 1) combined in a pat-
tern 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.
Composite Symbologies
Consist of a linear component, which encodes the item's primary data, and an adjacent
2D composite component, which encodes supplementary data to the linear component.
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