User's Manual

194 Glossary
PLCC
Acronym for plastic leaded chip carrier.
Plug and Play
An industry-standard specification that makes it easier
to add hardware devices to personal computers. Plug
and Play provides automatic installation and
configuration, compatibility with existing hardware,
and dynamic support of mobile computing
environments.
PME
Abbreviation for Power Management Event. A PME is
a pin on a peripheral component interconnect that
allows a PCI device to assert a wake event.
POST
Acronym for power-on self-test. Before the operating
system loads when you turn on your computer, the
POST tests various system components such as RAM,
the disk drives, and the keyboard.
power supply
An electrical system that converts AC current from the
wall outlet into the DC currents required by the
computer circuitry. The power supply in a personal
computer typically generates multiple voltages.
power unit
A set of power supplies in a system chassis.
ppm
Abbreviation for pages per minute.
PQFP
Abbreviation for plastic quad flat pack, a type of
microprocessor socket in which the microprocessor
chip is permanently mounted.
probe
An electronic sensor for measuring a quantity or
determining system state at a particular point within a
system. Server Administrator can monitor temperature,
voltage, fan, memory, current and chassis intrusion probes.
The probes provide a snapshot of the measured quantity
(such as the temperature at a particular place and time)
or state (a chassis intrusion has or has not occurred).
program diskette set
The set of diskettes from which you can perform a
complete installation of an operating system or
application program. When you reconfigure a program,
you often need its program diskette set.
protected mode
An operating mode supported by 80286 or higher
microprocessors, protected mode allows operating
systems to implement:
• A memory address space of 16 MB (80286
microprocessor) to 4 GB (Intel386 or higher
microprocessor)
• Multitasking
• Virtual memory, a method for increasing addressable
memory by using the hard drive
The Windows NT, Windows 2000, Windows XP,
OS/2
®
, and UNIX
®
32-bit operating systems run in
protected mode. MS-DOS cannot run in protected
mode; however, some programs that you can start from
MS-DOS, such as the Windows operating system, are
able to put the computer into protected mode.
provider
A provider is an extension of a CIM schema that
communicates with managed objects and accesses data
and event notifications from a variety of sources.
Providers forward this information to the CIM Object
Manager for integration and interpretation.
PS
Abbreviation for power supply.
PS/2
Abbreviation for Personal System/2.
PXE
Abbreviation for Pre-boot eXecution Environment.