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DSR Data Set Ready. Status signal to the printer
indicating the host is in a ready condition.
DTR Data Terminal Ready. Control signal from the printer
indicating it is in a ready condition.
DVFU Dataproducts direct access Vertical Format Unit.
E
EBCDIC Extended Binary Coded Data for Information
Communication.
EC Engine Controller
ECMA European Computer Manufacturers Association.
EEPROM Electrically Erasable Programmable Read Only
Memory.
EIA/TIA Electronic Industries Association/
Telecommunications Industry Association
Elite A name indicating a monospaced font with a pitch of
12 cpi (and usually 10 points in height).
em A unit of measure in typesetting: the width of a piece
of type about as wide as it is tall. (Derived from
uppercase M, usually the widest character in a set.)
emulation Refers to the ability of a printer to execute the
commands of another printer protocol. When used as
a proper noun (e.g., Proprinter III XL Emulation), it
means printer protocol. See also compatibility and
protocol.
en A unit of measure in typesetting equal to half the
width of an em.
enable To activate, make true (1), or set to on.
escape sequence A command sequence in which the first byte is
always the ASCII ESC character. Same as “escape
code.” See also command sequence, SFCC, SSCC.
ETX End of Text. A transmission control character sent
from the host to the printer, indicating the end of
transmission of a block of data.
EVFU Electronic Vertical Format Unit. Relates to the ability
to slew (skip quickly a specified number of lines).
expanded A font enhancement referring to larger-than-normal
character width with no change in character height.
F
false Off or zero. Compare true.