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OOB Out of Band. Fancy acronym for sideband signal.
OPROM Option ROM. Used to describe the code provided by hardware vendors to provide
support for integrated devices or add-in adapters.
OS Operating System
OTP Over-Temperature Protection
OVP Over-Voltage Protection
PAE Physical Address Extensions.
PAL Programmable Array Logic
PATA Parrallel-ATA.
PCI Peripheral Component Interconnect. Bus with multiplexed address and data lines
primarily intended for use as an interconnect system between processor/memory
and peripheral components or add-in cards.
PCI-Express* PCI Express*.
PCR Platform Configuration Register
PDB Power distribution board
PECI Platform Environmental Control Interface.
PEF Platform Event Filtering.
PEI
Pre EFI Initialization. Component of Intel
®
Platform Innovation Framework for EFI
architecture.
PEP Platform Event Paging
PET Platform Event Trap.
PFC Power Factor Correction
PIA platform information area
PIC 8259 Programmable Interrupt Controller logic.
PIROM Processor Information ROM
PLD Programmable Logic Device.
PME Power Management Event.
PMI Platform Management Interrupt.
PnP Plug and Play. See PnP_BIOS and PnP_ISA.
POST Power-on Self Test.
PROM programmable read-only memory
PSMI Power Supply Management Interface
PSU Power supply Unit
PTS Platform Trust Services
PVC Poly Vinyl Chloride – a plastic
PWM Pulse Width Modulation. The mechanism used to control the speed of system fans.
PXE Pre-boot eXecution Environment. This is the system envirionment when EFI
firmware is executing during boot and in control of system resources.
RAID Redundent Array of Independent Disks.
RAM Random Access Memory
Rank The set of SDRAM devices on one DDR branch which provides the data packet.
RAS Reliability, Availability, and Serviceability
RC4 Rivest Cipher 4. A stream cipher designed by Rivest for RSA data security, now
RSA security. It is a variable key-size stream cipher with byte-oriented operations.
The algorithm is based on a random permutation.
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