Glossary G

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.

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IBM EasyCoder 3400e user manual User-Defined Characters UDC, User-Defined Fonts UDF, Variable data field, XON/XOFF protocol