New to library barcodes or just need a refresher? Here's what you need to know before placing an order.
What is a barcode?
A barcode is a machine-readable representation of data — a series of bars and spaces that a scanner converts into a number or character string. For libraries, that number is typically a patron ID or item ID tied to your library automation system.
Key terms:
Symbology
The barcode “language.” The three most common for library systems are Code 3 of 9, Codabar, and Interleaved 2 of 5. Some older systems require a specific type.
Start & Stop Characters
Special characters at the beginning and end of the barcode that tell the scanner where the data starts and ends.
Quiet Zone
The clear space before and after the barcode. Loss of quiet zone due to misalignment can make a barcode unreadable.
Check Digit
A calculated character (usually the last digit) used to verify the accuracy of the scan. Most libraries use a 14-digit barcode with MOD 10 or MOD 43 check digits.
Librarian Quick Check — What we need to print your order:
- Barcode symbology (Code 3 of 9, Codabar, I2of5, etc.)
- Start number — 13 digits, we generate the check digit automatically (use X as placeholder, e.g. 3 1234 56789012 X)
- Total number of characters in the barcode
- Start and stop characters (Codabar only)
- Check digit type — if non-standard, the checksum algorithm
- Any special formatting requirements
- Label type — Singles, Pairs, Two-Part, etc.
- For new customers: a sample of a current barcode label (scanned and emailed is best)
We're happy to provide a PDF proof before production for testing with your library automation system — just ask.
Get in touch
Contact us at info@dynamicimagingsolutions.com or call 1-800-268-6563.