Motorola MC21XX SERIES User Manual page 105

but are optional for other symbologies. Using check digits decreases the chance of substitution errors when a
symbol is decoded.
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.
Code Length. Number of data characters in a bar code between the start and stop characters, not including those
characters.
Cold Boot. A cold boot restarts the MC21XX and erases all user stored records and entries.
COM port. Communication port; ports are identified by number, e.g., COM1, COM2.
Continuous Code. A bar code or symbol in which all spaces within the symbol are parts of characters. There are no
intercharacter gaps in a continuous code. The absence of gaps allows for greater information density.
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.
D
Decode. To recognize a bar code symbology (e.g., UPC/EAN) and then analyze the content of the specific bar code
scanned.
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 Code. A bar code or symbol in which the spaces between characters (intercharacter gaps) are not part of the
code.
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.
E
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.
Glossary - 3