Intermec EasyCoder 4420 User Manual page 122

Glossary
110
Standard protocol
A communications protocol capable of controlling communications
between two devices connected by a single data communication line.
symbology
A scheme for encoding data as bar code. Code 39, Interleaved 2 of 5, and
Codabar are examples of different symbologies.
thermal transfer
A method of printing by which heat from the printhead melts ink from
the ribbon onto media. The ink adheres to the media as it cools and the
ribbon is removed.
top of form
The point where printing can start on a label. The top of form is separated
from the edge of the label by the margin.
UPC
Universal Product Code. A numeric, 12-digit bar code symbology used
extensively in retail, particularly the grocery industry.
UDC
User Defined Character. See graphic.
UDF
User Defined Font. See soft font.
variable data field
Bar code and text fields that change from one label to the next.
XON/XOFF
A protocol that stops the host from sending data when the printer buffer
fills up and starts it again when the buffer empties.
EasyCoder 4420 and 4440 Bar Code Label Printer User's Manual