a product, part, or publication number. Bar codes are designed to be read by a device called a bar code reader or scanner. The scanner must be compatible with the printed bar code symbology.

The following sections show examples of two bar codes: Code 3 of 9 and

POSTNET.

Code 3 of 9 Bar Code Example

Code 3 of 9 is a discrete bar code symbology because each character stands by itself and is separated from the others by a non-data space or intercharacter gap. Code 3 of 9 is constructed so that each character has 9 elements (count both bars and spaces, but do not count the intercharacter gap) with 3 of those elements being wide.

Figure 26 shows an example of the Code 3 of 9 bar code symbology.

Figure 26. Code 3 of 9 Bar Code Example

POSTNET (Postal Bar Code) Bar Code Example

The POSTNET bar code uses five bars to represent a digit. The data is based on the height of the bars instead of on their width. This symbology requires a check digit or a correction digit. POSTNET is a numeric bar code only with each digit that has 2 tall bars and 3 short bars.

Figure 27 shows an example of the POSTNET bar code symbology.

Figure 27. POSTNET Bar Code Example

How APU Works with Bar Codes

APU provides comprehensive support for bar codes:

vPrinting application data or constant data in bar code format

vHandling the 12 major bar code symbologies and their variations

vFull control over size and positioning

vHandling the special attributes of each bar code, such as human-readable information and check digits

In the following example, the zip code is remapped into a POSTNET bar code. From the Define Field Mapping panel, use F14 to mark the beginning of the zip code field and F15 to mark the end of the zip code field, then press Enter. The Select function pop-up panel appears. Select Map as Bar Code to see the following panel.

30APU User's Guide

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IBM S544-5351-03 Code 3 of 9 Bar Code Example, Postnet Postal Bar Code Bar Code Example, How APU Works with Bar Codes