developed by Computer Identics Corp. in 1981,
named for being able to symbolize 128 characters in
In other bar codes,
one character can express one type of data.
In CODE-128, through the selective use of
the start character,
one character can express three types of data in any position.
- Selective Start Characters
|Start Code - A
||following characters are expressed using
|Start Code - B
||following characters are expressed as a 1-digit
or a mark.
|Start Code - C
||following characters are expressed as a 2-digit number.
Change in Data Content By Start Character
- Code Set Character
|Code - A
||changes the type of following characters
|Code - B
||changes the type of following charactesr
to 1-digit alpha-numeric.
|Code - C
||changes the type of following characters to 2-digit numbers.
- Shift Character
alters only the following single character from
A --> B, B --> C, or C --> A, then back to the original type code.
- Function Character
a character for special definition;
for example, by inserting FC1 after the Start-code character,
it indicates that the data is coded in the
With its flexible functionality, it has been adopted
as worldwide-common supplemental code for physical distribution.
Summary of Code-128 Symbol