Glossary

A

Aperture. The opening in an optical system defined by a lens or baffle that establi shes the field of view.
ASCII. American Standard Code for Information Interchange. A 7 bit-plus-parity c ode representing 128 letters, numerals,
punctuation marks and control characters. It is a standard data transmissio n code in the U.S.
Autodiscrimination. The ability of an interface controller to determine the code type of a scanned bar c ode. After this
determination is made, the information content is decoded.

B

Bar. The dark element in a printed bar code symbol.
Bar Code. A pattern of variable-width bars and spaces which represents numeric or alphan umeric data in machine-readable
form. The general format of a bar code symbol consists of a leading margin, s tart 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. See Symbology.
Bar Code Density. The number of characters represented per unit of measurement (e.g., cha racters per inch).
Bar Height. The dimension of a bar measured perpendicular to the bar width.
Bar Width. Thickness of a bar measured from the edge closest to the symbol start character to the trail ing edge of the same
bar.
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). Bits transmitted or received.
Bluetooth. A technology that provides a way to connect and exchange informatio n between devices such as scanners,
mobile phones, laptops, PCs, and printers over a secure, globally unlicensed short-range radio frequency.