IBM Ricoh FB750 - Manual (Page 60)

60
OpenGL
3-D software interface (3-D API). Implemented, for example, in Windows NT and later releases of Windows
95. Based on Iris GL from Silicon Graphics and licensed by Microsoft.
Optical Resolution
The true resolution of the scanner determined by its hardware optics. The scanner driver yielding an
interpolated resolution often enhances optical resolution.
PAL
The standard video format of Europe, Australia, and New Zealand.
Palette
The palette is a limited set of colors that are present in a digital image.
Parallel Port
A 25-pin (generally female) port on the computer that transmits data in a parallel stream. The parallel port
signal is not very strong and degrades the further it goes. Even though there are now several different devices
designed to connect to a parallel port, the parallel port generally cannot support multiple devices (more than
one or two).
Parallel Port Device
Any device that is designed to be connected to a computer parallel port: Printers, Scanners, Zip drives, Image
Capture Devices, etc.
Parallel Port Mode
The parallel port mode is the mode that is set in the BIOS to tell the computer how to communicate with
devices connected to the parallel port, such as a printer, scanner, or other parallel port device. There are
different parallel port modes that are supported by most modern computers: SPP (standard), BPP (bi-
directional), EPP (enhanced), and ECP (enhanced centronics).
Pass-through Port
A pass-through port will allow signal to be sent through it to another device connected to the item with the
pass-through port to allow more than one device to use the same computer port. Pass-through ports are
generally found on parallel port devices (other than most printers) and SCSI devices.
Photo CD
This file format was developed by Kodak for digitizing and storing 35mm negatives or slides on CD.
PMT
PhotoMultiplier Tube. A special light-sensitive vacuum tube that is used to convert films or prints into digital
images. PMT is used in expensive, professional-quality drum scanners. Most consumer-quality or
inexpensive scanners use CCD or CIS.
Pixel
An abbreviation of Picture Element, this is the smallest possible element of an image on the screen, or a
single dot of one color usually displayed in rows and columns.
Plug and Play
Windows 95 and some motherboards support Plug and Play devices. The Windows 95 detects these devices
or interface cards when it first boots after their installation. After Windows 95 detects a device, it will begin