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Glossary
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nonvolatile memory
A memory in which the data content is maintained whether the
power supply is connected or not.
NTSC
National Television Standards Committee (USA)
NVRAM
Non-Volatile Random Access Memory
OEM
Original Equipment Manufacturer
OMPAC
Over - Molded Pad Array Carrier
OS
Operating System. The software that manages the computer
resources, accesses files, and dispatches programs.
OTP
One-Time Programmable
palette
The range of colors available on the screen, not necessarily
simultaneously. For VGA, this is either 16 or 256 simultaneous
colors out of 262,144.
parallel port
A connector that can exchange data with an I/O device eight bits
at a time. This port is more commonly used for the connection of
a printer to a system.
PCI (local bus)
Peripheral Component Interconnect (local bus) (Intel). A high-
performance, 32-bit internal interconnect bus used for data
transfer to peripheral controller components, such as those for
audio, video, and graphics.
PCMCIA (bus)
Personal Computer Memory Card International Association
(bus). A standard external interconnect bus which allows
peripherals adhering to the standard to be plugged in and used
without further system modification.
PDS
Processor Direct Slot
physical address
A binary address that refers to the actual location of information
stored in secondary storage.
PIB
PCI-to-ISA Bridge
pixel
An acronym for picture element, and is also called a pel. A pixel
is the smallest addressable graphic on a display screen. In RGB
systems, the color of a pixel is defined by some Red intensity,
some Green intensity, and some Blue intensity.
PLL
Phase-Locked Loop
PMC
PCI Mezzanine Card
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