Epson 4100 manual Number System Characters and Country Flags

E-16 Appendix E—Barcodes

		Printer
	Check Digit	Calculates and	Check Digit	No Check
	Required	Appends Check	Optional	Digit
		Digit	•
Code 39
Interleaved 2 of 5			•
Codabar	•		•
UPC-A		•
UPC-E				•
EAN-8	•
EAN-13		•
PostNet

The check digit prints out along with all other barcode characters in the human readable line.

NUMBER SYSTEM CHARACTERS AND COUNTRY FLAGS

The first character in UPC barcodes and the first two characters in EAN- 13 barcodes are for symbol identification. The first digit is called a number system character. In EAN-13 barcodes, the second character is a country flag.

The number system character (and the country flag for EAN-13 barcodes) must be sent to the printer along with the other characters in the code. It is the first digit of the code.