Velleman projects PCS10 pcs10 - K8047 User manual - Manual (Page 19)

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PCS10/K8047 © 2003 Velleman Components
when needed by the program that calls them.
1.7.3 Logical printer
The software interface between the operating system and the printer in Windows. While a printer is the
device that does the actual printing, a logical printer determines how a print job is processed and how it
is routed to its destination (to a local or network port, to a file, ...). When you print a document, it is
spooled (or stored) on the logical printer before it is sent to the printer itself.
See also printer; spooling.
1.7.4 Plug and Play
A set of specifications developed by Intel that allows a computer to automatically detect and configure
a device and install the appropriate device drivers.
1.7.5 Port
Generally, a connection point on your computer where you can connect devices that pass data into and
out of a computer. For example, a printer is typically connected to a parallel port (also called an LPT
port), and a modem is typically connected to a serial port (also called a COM port).
1.7.6 Print spooler
Computer software that accepts a document sent to a printer by the user and then stores it on disk or
in memory until the printer is ready for it. This collection of dynamic-link libraries (DLLs) receives,
processes, schedules, and distributes documents for printing. The term spooler is an acronym created
from "simultaneous print operations on line."
See also DLL; spooling.
1.7.7 Printer
A device that puts text or images on paper or other print media. Examples include laser printers or dot-
matrix printers.
See also logical printer; Printer; Print spooler.
1.7.8 Spooling
A process on a server in which print documents are stored on a disk until a printer is ready to process
them. A spooler accepts each document from each client, stores it, then sends it to a printer when the
printer is ready.
See also print spooler.
1.7.9 USB
An external bus that supports Plug and Play installation. Using USB, you can connect and disconnect
devices without shutting down or restarting your computer. You can use a single USB port to connect
up to 127 peripheral devices, including speakers, telephones, CD-ROM drives, joysticks, tape drives,
keyboards, scanners, and cameras. A USB port is usually located on the back of your computer near
the serial port or parallel port. Universal serial bus is also called USB.
See also Plug and Play; port.