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.
PRN file
An interface for a device driver, this allows software to interact with the device driver using standard input/output
system calls, which simplifies many tasks.
Protocol
A convention or standard that controls or enables the connection, communication, and data transfer between two
computing endpoints.
PS
See PostScript.
PSTN
The Public-Switched Telephone Network (PSTN) is the network of the world's public circuit-switched telephone
networks which, on industrial premises, is usually routed through the switchboard.
RADIUS
Remote Authentication Dial In User Service (RADIUS) is a protocol for remote user authentication and accounting.
RADIUS enables centralized management of authentication data such as usernames and passwords using an AAA
(authentication, authorization, and accounting) concept to manage network access.
Resolution
