HP QMS 1660E - Manual (Page 276)

Controller
QMS 1660E Print System Reference G-4
Controller
The software that controls the engine of a printer. The controller is the
intelligence of the printer.
Crown
A multitasking operating system architecture developed by QMS and used
in the QMS 1660E Print System.
Default
A printer control panel setting used in the absence of a application selection.
See also
factory default.
Download
Transfer information from one device to another. Downloaded fonts and
emulations are not built into the printer. They are transferred from the
computer and temporarily stored in the printer's memory (until the printer
is turned off) or on a hard disk.
dpi
An acronym for dots per inch, a measurement unit used to indicate printer
resolution. Your QMS 1660E Print System has 300x300, 600x600, and
1200x600 dpi resolution.
Driver
See printer driver.
DTR/DSR
An acronym for Data Terminal Ready and Data Signal Received, a hard-
ware-controlled protocol. It controls the flow of data via signals on the DTR/
DSR line, as opposed to XON/XOFF protocol, which is software controlled.
Electrophotographic Drum
A drum in the toner cartridge that is sensitive to both light and electricity. It
is used in the creation and transfer of images to the printed page. See also
toner, toner cartridge.
Emulation
Software that allows the printer to respond to commands intended for a
different type of printer. For example, when the printer is set for HP PCL