Symbol Technologies MC9000-K - Manual (Page 507)

Glossary GL-5
Character Set Those characters available for encoding in a particular bar
code symbology.
Check Digit A digit used to verify a correct symbol decode. The scanner
inserts the decoded data into an arithmetic formula and
checks that the resulting number matches the encoded
check digit. Check digits are required for UPC 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: ( -
$ : / , +).
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 mobile computer 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.