Background   Backscatter
The white spaces and quiet zones surrounding a printed bar code.
A method of communication used by passive RFID tags and readers, where the tag reflects back radio waves generated by a reader.
Bar   Barcode
The darker element of a printed bar code field.
A technology that uses white spaces and black bars to represent encoded information. This encoded information can then be read with an optical device that converts the bars and spaces into an electrical signal, which is then decoded into the original characters.
Barcode Reader   Bar Code Character
A device (light pen, laser gun, fixed scanner, etc.) used to read a bar code field.
A single group of bars and spaces that represents a specific individual number, letter, punctuation mark, or other symbol. This is the smallest subset of a bar code symbol that contains data.
Bar Width   Battery-assisted Passive Tag
The thickness of an individual bar measured from edge to edge of the same bar.
"Semi-passive" RFID tags with an onboard power source to run the circuitry, but which communicate with a reader using the same backscatter technique as passive tags.
Bi-directional   BISYNC
A bar code symbol capable of being read successfully if scanned in either direction.
Binary Synchronous Communication. Protocol supported by the IBM System i for communicating with other System i (iSeries, AS/400), IBM mainframe, System/36, and System/38 systems.
Black Mark   Bluetooth
Sensor mark usually printed on the reverse (non-printing) side of tag stock, or on the liner (backing paper) of label stock.
Industrial specification for wireless personal area networks. Connects devices such as mobile phones, laptops, PCs, printers, digital cameras, and video game consoles over a secure, globally unlicensed short-range radio frequency. Developed and licensed by the Bluetooth Special Interest Group.
BMP   Butt Cut
Microsoft Windows bitmap graphics file format.
Form of bar code label stock used in continuous operations. Butt cut stock usually yields an additional 10% more individual labels than die cut stock.