- packed-pixel frame
- A portion of the display memory that holds the contents of a single screen
image with screen bits stored in a single plane and with each pixel on the
screen having a set of two or more corresponding bits that define the pixel
- PAL format
- Phase Alternation Line format. The European video standard, except for
France. See also NTSC and SECAM.
- PC 97
- The 1997–98 requirements for PC system and peripheral design for the
"Designed for Microsoft Windows" logo, as defined in PC 97 Hardware
- PC 98
- The 1998–99 requirements for PC system and peripheral design for the
"Designed for Microsoft Windows" logo, as defined in PC 98
Checklist, which is an addendum to PC 97 Hardware Design
- PC Card
- A trademark of PCMCIA. A removable device that is designed to be plugged
into a PCMCIA slot and used as a memory-related peripheral.
- Peripheral Component Interconnect. A high-performance, 32-bit or 64-bit
bus designed to be used with devices that have high bandwidth requirements,
such as the display subsystem.
- Pulse code modulation. A method of encoding information in a signal by
varying the amplitude of pulses. The most common method of encoding an analog
signal into a digital bit stream.
- Personal Computer Memory Card International Association. Sometimes used to
refer to a controller for a type of expansion card documented in the PCMCIA
- Programmable interrupt controller
- A set of filter-defined properties in kernel streaming and ActiveMovie
that specify a connection endpoint. For example, audio input can be described
by a pin on a filter.
- An abbreviation for picture element. The minimum raster display element,
represented as a point, with a specified color or intensity level. One way to
measure picture resolution is by the number of pixels used to create images.
- See system board.
- Plug and Play (PnP)
- A design philosophy and set of specifications that describe hardware and
software changes to the PC and its peripherals that automatically identify and
arbitrate resource requirements among all devices and buses on the system.
Plug and Play specifies a set of API elements that are used in addition to,
not in place of, existing driver architectures.
- Plug and Play BIOS
- A BIOS with responsibility for configuring Plug and Play cards and
system-board devices during system power up. Provides runtime configuration
services for system board devices after startup. See also ACPI.
- A connection or socket used to connect a device—such as a printer,
monitor, or modem— to the computer. Information is sent from the computer to
the device through a cable.
- port driver
- A low-level driver that responds to a set of system-defined device control
requests and possibly to an additional set of driver-defined (private) device
control requests sent down by a corresponding class driver. A port driver
insulates class drivers from the specifics of host bus adapters and
synchronizes operations for all its class drivers.
- port replicator
- Low-cost docking-station substitute intended to provide convenient,
one-step connection to multiple desktop devices.
- Power-on self-test. A procedure of the system BIOS that identifies, tests,
and configures the PC in preparation for loading the operating system.
- power management
- Mechanisms in software and hardware to minimize system power consumption,
manage system thermal limits, and maximize system battery life. Power
management involves trade-offs among system speed, noise, battery life,
processing speed, and AC power consumption. Power management is required for
some system functions, such as appliance operations (including answering
machine, furnace control, and so on).
- power policy
- For power management, the decisions that determine how to save energy and
when to go to sleep, based on end-user preferences, application needs, and
system hardware capabilities.
- power resources
- Resources such as power planes, clock sources, and so on that a device
requires to operate in a given power state.
- power sources
- The battery and AC adapter that supply power to a platform.
- program guide
- The on-screen user interface that allows users to select, manage, and
search television programs and other content-viewing options.
- In WDM and Windows NT/Windows 2000 device driver models, an aspect of
the device or stream that can be set or retrieved, such as volume level.
- property set
- In WDM and Windows NT/Windows 2000 device driver models, a method
defined to set and get properties on a driver. Each property set has a unique
identifier, which represents types of related information and is used to
access the property set.
- Also CCITT Recommendation H.261. A draft standard for motion video
compression in videophone and teleconferencing applications, designed for
64-Kbps transmission channels.