Intermec EasyCoder 3400 User Manual page 128

Glossary
114
UPC
Universal Product Code. A numeric, 12-digit bar code symbology used
extensively in retail, particularly the grocery industry.
User-Defined Characters (UDC)
See graphic.
User-Defined Fonts (UDF)
See soft font.
variable data field
Bar code and text fields that change from one label to the next.
XON/XOFF protocol
A protocol that stops the host from sending data when the printer buffer
fills up and starts it again when the buffer empties.
3400, 3440, and 3600 Bar Code Label Printer User's Manual