Worth Data RF Terminal 7000 - Manual (Page 96)

must first enable them using the RF Terminal Setup Menu.
NOTE: Enabling the supplements disallows the reading of UPC codes from right to left to assure that the 2
and 5 digit supplements are not get missed. Coupon codes can be read from right to left or left to right.
ISBN Specifications
ISBN (International Standard Book Numbering) bar codes are essentially EAN-13 with a 5 digit supplement,
where the first 3 digits are the Bookland country codes of 978 for books and 977 for periodicals. Although the
bar code contains 18 characters, the ISBN format uses only 9 of them, along with a newly calculated Mod-11
check digit. For example, a bar code containing the numbers 978055337062153495 would transmit as
0553370626 in the ISBN format.
The RF Terminal has the option of transmitting in the ISBN format.
ISBN 0-553-37062
ISBN specifications are available from:
American National Standards Institute
Customer Service
11 West 42
nd St.
New York, NY 10036
http://web.ansi.org
document ISO 2108:1992
The UPC/EAN checksum character
The last character in a UPC-A, UPC-E, UPC-E1, EAN-13 or EAN-8 bar code is the checksum. For
reference, these are the methods of calculation:
Checksum calculation for UPC-A, EAN-13 and EAN-8
Use Worth Data's phone number (it's not a real UPC-A code) as sample data:
18314589938
Assign even and odd positions, starting at the right and moving left:
8 3 9 9 8 5 4 1 3 8 1
odd even odd even odd even odd even odd even odd
Starting with the leading digit, 8, take the sum of all the characters in the odd positions.
8 + 9 +8 + 4 + 3 + 1 = 33
Multiply the result of step 1 by 3.
33 x 3 = 99
Now take the sum of all the even-position characters.
3 + 9 + 5 + 1 + 8 = 26
Add the result in Step 2 to the result in Step 3.
99 + 26 = 125
Subtract the result from the next higher multiple of 10.
Next higher multiple of 10 over 125 = 130
130 - 125 = 5