User's Manual

Bar CodesAppendix —C
366 700 Series Color Mobile Computer User’s Manual
I2of5(Interleaved)
I 2 of 5 (Interleaved 2 of 5 Code) is an all-numeric symbology, widely used
for warehouse and heavy industrial applications. Its use has been particu-
larly prevalent in the automobile industry. The I 2 of 5 symbology can be
placed on smaller labels than what the standard UPC symbology requires.
I 2 of 5 also provides a little more flexibility on the type of material it can
print on. Interleaved 2 of 5 Code has its name because of the way the bar
code is configured.
I 2 of 5 bars and spaces both carry information. The bars represent the
odd number position digits, while spaces represent the even number posi-
tion digits. The two characters are interleaved as one. Messages encoded
with this symbology have to use an even number of characters since two
numeric characters always get interleaved together.
S2of5(Standard2of5)
The code S 2 of 5 (Standard 2 of 5 Code) is designed primarily for:
S Warehouse inventory handling
S Identification of photo finishing envelopes
S Airline tickets
S Baggage and cargo handling
The code S 2 of 5 is simple and straightforward. All information is con-
tained in the widths of the bars, with the spaces serving only to separate
the individual bars.
Bars can either be wide or narrow, and the wide bars are usually three
times the widths of the narrow bars. Spaces may be any reasonable width
but are typically equal to the narrow bars. Narrow bars are identified as
zero bits and wide bars as one bits.
Remember the code structure by associating the bar positions from left to
right with weighting factors 1, 2, 4, 7, and parity. Exceptions to this rule
are zero, start, and stop. This code is a discrete code, since the white spaces
between the characters are not part of the code. Because the white spaces
carry no information, their dimensions are not critical.
The S 2 of 5 code is self-checking, meaning a scanner passing through a
printing void would detect the proper ratio of wide bars to total bars.
When the scanner spots an error, a non-read will occur.