GlossaryA
Aperture. The opening in an optical system defined by a lens or ba ffle that establishes the field of view.
ASCII. American Standard Code for Information Interchange. A 7 bi t-plus-parity code representing 128 letters, numerals,
punctuation marks and control characters. It is a standar d data transmission code in the U.S.
Autodiscrimination. The ability of an interface controller to determine the code type of a scanned bar code. 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 nu meric or alphanumeric data in machine-readable
form. The general format of a bar code symbol consists of a leading margin, start character, data or message charact er,
check character (if any), stop character, and trai ling margin. Within this framework, each recogniza ble symbology uses
its own unique format. See Symbology.
Bar Code Density. The number of characters represented per unit of meas urement (e.g., characters per inch).
Bar Height. The dimension of a bar measured perpendicular to the ba r width.
Bar Width. Thickness of a bar measured from the edge closest to the symbol start ch aracter to the trailing edge of the same
bar.
Bit. Binary digit. One bit is the basic unit of bin ary information. Generally, eight consecutive bits compose one byte of data.
The pattern of 0 and 1 values within the byte determines its m eaning.
Bits per Second (bps). Bits transmitted or received.
Bluetooth. A technology that provides a way to connect and exchange information between devices such as scanners,
mobile phones, laptops, PCs, and printers over a secu re, globally unlicensed short-range radio frequency.