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Glossary - 3

Codabar. A discrete self-checking code with a character set consisting of digits 0 to 9 and six additional characters: (“-”, “$”,

“:”, “/”, “,”, and “+”).

Code 128. A high density symbology which allows the controller to encode all 128 ASCII characters without adding extra

symbol elements.

Code 3 of 9 (Code 39). A versatile and widely used alphanumeric bar code symbology with a set of 43 character types,

including all uppercase letters, numerals from 0 to 9 and 7 special characters (“-”, “.”, “/”, “+”, “%”, “$” and space). The

code name is derived from the fact that 3 of 9 elements representing a character are wide, while the remaining 6 are

narrow.

Code 93. An industrial symbology compatible with Code 39 but offering a full character ASCII set and a higher coding

density than Code 39.

Cold Boot. A cold boot restarts the mobile computer and erases all user stored records and entries.

COM port. Communication port; ports are identified by number, e.g., COM1, COM2.

Cradle. A cradle is used for charging the terminal battery and for communicating with a host computer, and provides a

storage place for the terminal when not in use.

Dead Zone. An area within a scanner's field of view, in which specular reflection may prevent a successful decode.

Decode. To recognize a bar code symbology (e.g., UPC/EAN) and then analyze the content of the specific bar code

scanned.

Decode Algorithm. A decoding scheme that converts pulse widths into data representation of the letters or numbers

encoded within a bar code symbol.

Decryption. Decryption is the decoding and unscrambling of received encrypted data. Also see, Encryption and Key.

Depth of Field. The range between minimum and maximum distances at which a scanner can read a symbol with a certain

minimum element width.

Discrete 2 of 5. A binary bar code symbology representing each character by a group of five bars, two of which are wide.

The location of wide bars in the group determines which character is encoded; spaces are insignificant. Only numeric

characters (0 to 9) and START/STOP characters may be encoded.

EAN. European Article Number. This European/International version of the UPC provides its own coding format and

symbology standards. Element dimensions are specified metrically. EAN is used primarily in retail.

EMDK. Enterprise Mobility Developer’s Kit.

ESD. Electro-Static Discharge

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