Appendix
Section 8
February 2010 Digital Talking-Book Player 54
Library Guide
8 Appendix
8.1 Barcode Format
Each Digital Talking-Book Machine, Cartridge, and Container is assigned a unique serial number.
The barcode format used in all cases is Code 39 with a modulo 43 check digit. This code is also known as
MIL-STD-1189, ANSI MH10.8M-1983, Code 3/9, and Code 3 of 9.
8.1.1 Player Serial Number Barcode
The player serial number is printed as an alphanumeric sequence and as a barcode on labels affixed to the rear of the
player, on the individual player box and on the multiple player overpack. The serial number is also coded into the
memory of the player so that it can be rendered as audio.
To reduce the space required for the barcode, the model number and dash are replaced with a two character code.
“DS1-” is replaced with “Z1” and “DA1-” is replaced with “Y1”. Thus a barcode scanner would read “DS1-
0000001” as “Z10000001.”, where the last character is the mod 43 checksum.
The serial number labels, with the exception of the lower player label, also include the month and year that the
player was manufactured in the form “MM.YY”
8.1.1.1 Player Barcode Labels
Figure 8-1. DTBM Top Serial Number Label
02.09
Figure 8-2. DTBM Bottom Serial Number Label
8.1.1.2 Individual Box Label
Figure 8-3. Individual Box Serial Number Label
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