Glossary
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MMR
Modified Modified READ (MMR) is a compression method recommended by ITU-T T.6.
Modem
A device that modulates a carrier signal to encode digital information, and also demodulates such a carrier signal to
decode transmitted information.
MR
Modified Read (MR) is a compression method recommended by ITU-T T.4. MR encodes the first scanned line using
MH. The next line is compared to the first, the differences determined, and then the differences are encoded and
transmitted.
NetWare
A network operating system developed by Novell, Inc. It initially used cooperative multitasking to run various services
on a PC, and the network protocols were based on the archetypal Xerox XNS stack. Today NetWare supports TCP/IP
as well as IPX/SPX.
OPC
Organic Photo Conductor (OPC) is a mechanism that makes a virtual image for print using a laser beam emitted from
a laser printer, and it is usually green or gray colored and a cylinder shaped.
An exposing unit of a drum is slowly worn away by its usage of the printer, and it should be replaced appropriately
since it gets scratches from grits of a paper.
Originals
The first example of something, such as a document, photograph or text, etc, which is copied, reproduced or translated
to produce others, but which is not itself copied or derived from something else.
OSI
Open Systems Interconnection (OSI) is a model developed by the International Organization for Standardization (ISO)
for communications. OSI offers a standard, modular approach to network design that divides the required set of
complex functions into manageable, self-contained, functional layers. The layers are, from top to bottom, Application,
Presentation, Session, Transport, Network, Data Link and Physical.
PABX
A private automatic branch exchange (PABX) is an automatic telephone switching system within a private enterprise.
PCL
Printer Command Language (PCL) is a Page Description Language (PDL) developed by HP as a printer protocol and
has become an industry standard. Originally developed for early inkjet printers, PCL has been released in varying
levels for thermal, matrix printer, and page printers.
Portable Document Format (PDF) is a proprietary file format developed by Adobe Systems for representing two
dimensional documents in a device independent and resolution independent format.
PostScript
PostScript (PS) is a page description language and programming language used primarily in the electronic and
desktop publishing areas. - that is run in an interpreter to generate an image.
Printer Driver
A program used to send commands and transfer data from the computer to the printer.
Print Media
The media like paper, envelopes, labels, and transparencies which can be used on a printer, a scanner, a fax or, a
copier.
PPM
Pages Per Minute (PPM) is a method of measurement for determining how fast a printer works, meaning the number of
pages a printer can produce in one minute.
