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Page 13-13GLOSSARY
Trigger The character(s) that indicates the
beginning of a transparent command.
TRN Transparency.
Two-trigger A type of pseudo transparency that uses
a sequence of two normally printable
characters as the trigger, and which is
ended with a terminator.
U
UDK User-defined key. Feature used in
Xerox laser printers to define a
substitute escape character.
ULTRA An AGILE protocol converter that
allows industry standard serial and
parallel ASCII and EBCDIC printers to
be attached to a 3270-type controller
and to serial and parallel alternate hosts.
Unisys A large manufacturer of computer
equipment.
V
VCS Vertical channel select.
Vertical channel select An SCS command that the ALLY
PLUS outputs as one or more CR/LF
sequences.
Vertical Tab Moves the presentation position down
to the next vertical tab stop.
VT Vertical tab.
VTAM Virtual telecommunications access
method.
W
Word length The number of data bits in a word.
X
XDPM Xerox Decentralized Print Mode.