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Industrial 2 of 5
Basic structure of 2 of 5
The 2 of 5 bar code is a binary
level bar code that was developed by Identicon
Corp. and Computer Identics Corp. in 1970, and is credited for spawning many
other types of barcodes.
Basically 2 of 5 consists of 5 bars: 2 wide bars and 3 narrow bars.
4 of the 5 bar positions hold a value or weight.
As shown in the diagram below, the 4 left-most bar positions hold the values
1, 2, 4, and 7 respectfully while the 5th bar position is a parity
bit for
self check.
As the table above illustrates, to obtain the sum of values of 5, a wide bar
would have to be in bar position 1 and 3 while the remaining bar positions
would contain narrow bars. In order to obtain a sum of values of 7, a wide
bar would have to be in bar position 4 and 5 due to the fact
that
2 wide
bars MUST be present. Once again the remaining bar positions
would contain narrow bars.
This simple structure breeds many types of 2 of 5 bar codes.
Industrial 2 of 5
At one point, Industrial 2 of 5 was the standard used for industry but
due to several limitations,
the CODE-39 barcode type took its place.
Conversely, its simplicity has made it suitable for cardboard printing and
as a result it is now often used for management of physical distribution.
Summary of 2 of 5 Industrial Symbol
Character Composition
![[Character Composition of INDUSTRIAL 2of5]](images/indust2.gif)
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