IBM 1725 SLS - Manual (Page 302)

Gamma
Correction
QMS 1725 SLS Print System User's Guide G-6
Gamma Correction
Gamma corrections allow you to sharpen the midrange contrast when
scanning black and white images.
Gray Scale
Progressive shades from black to white which provide detail and contrast
to printed images.
Handshake, Handshaking
A procedure, usually part of a communications protocol, to establish a data
communications path. Devices must be able to communicate with each
other. Your printer uses either XON/XOFF or DTR/DSR protocol to com-
municate with a computer.
Hard Disk
A secondary storage place for such items as downloaded fonts and
emulations and for spooled data, thus providing virtual memory capabilities.
You can add an internal hard disk and up to three external hard disks to
your QMS 1725 SLS Print System.
Header Page
A separator page, printed before a print job, that identifies the print job and
helps users sort out the print jobs in the printer's output tray. See the
QMS
Crown Document Option Commands manual information on customizing
the header page information.
Heap
A portion of memory reserved for a program to use for temporary storage.
Host
The computer or network to which a printer is connected.
HP PCL
An acronym for Hewlett-Packard Printer Control Language, the printer
control language native to the HP Laser Jet Series II and III printers. Your
QMS 1725 SLS Print System has a resident HP PCL 5 emulation.