ExpertGlossary terms starting with P

3,647 terms

(PC)NFS Personal Computer Network File System.
p Denotes the shorter of the two chromosome arms, e.g. human 14p is the short arm of human chromosome 14.
p × 64 In video teleconferencing, pertaining to a family of CCITT (now, ITU-T) Recommendations, where p is a non-zero positive integer indicating the number of…
P 2 Pollution Prevention.
p 2 NRTA&A Pre-Planned Near-Real-Time Assessment and Adaptation.
P 3 Pollution Prevention Program.
P 3 I Preplanned Product Improvement.
P element A Drosophila transposon.
P N A semiconductor (photovoltaic) device structure in which the junction is formed between a p-type layer and an n-type layer.
P&D Planning and Design (MILCON term).
P&G Basically, the procedure for checking the cubic-inch displacement of an engine. The term comes from the manufacturer of the particular gauge used.
P&I Abbreviation for principal and interest.
P&M (1) Producibility and Manufacturing. (2) Procure and Manufacture.
P-32 A radioactive form of the element phosphorus used in the treatment of cancer.
P-I-N A semiconductor (photovoltaic) device structure that layers an intrinsic semiconductor between a p-type semiconductor and an n-type semiconductor; this…
P-site Abbreviation for peptidyl-tRNA binding site.
P-Type Semiconductor A semiconductor in which holes carry the current; produced by doping an intrinsic semiconductor with an electron acceptor impurity (e.g.
p-value A statistics term. A measure of probability that a difference between groups during an experiment happened by chance.
P.C. The house edge expressed as a percentage.
P.T Pipe thread.
P1 message header The P1 message header is the [transport envelope] address information that is used by message transfer agents (MTAs) to route mail.
P1, P2 Generational symbols for the two parents of a given individual.
P1-derived artificial chromosome (PAC) One type of vector used to clone DNA fragments (100- to 300-kb insert size; average, 150 kb) in Escherichia coli cells.
P2 Pollution Prevention.
P2 message header The P2 message header contains only the message recipient data that the sender declared to the recipients.
P2V (Physical to Virtual) migration migrating an operating system and its installed applications from a physical computer to a virtual machine (or a partition), without modification.
P3 Pollution Prevention Program.
p53 A gene which normally regulates the cell cycle and protects the cell from damage to its genome.
p53 gene A tumor suppressor gene that normally inhibits the growth of tumors. This gene is altered in many types of cancer.
PA (1) Product Assurance. (2) Public Affairs.
PA&E Program Analysis and Evaluation.
PA&ID Program Analysis and Integration Directorate.
PaaS (Platform as a Service) is comparable to renting servers from large data centres. The "rented server" is yours to do with as you please so you can put any stack you want on the…
Paasche See Paasche price index
Paasche price index A fixed-weighted price index that is computed as the sum of current-period quantities valued at current-period prices divided by the sum of current-period…
PAB A Microsoft Outlook list of recipients created and maintained by an individual user for personal use.
PAB (Personal Address Book) A customizable address list in which a user can add and delete names of users and personal distribution lists to which messages frequently are addressed.
PABX Abbreviation for private automatic branch exchange. See PBX. Note: Use of the term "PBX" is more common than "PABX," regardless of automation.
PAC Patent Assistance Center (prior), now the Inventors Assistance Center or IAC, call (toll-free) 1-800-786-9199 or 703-308-4357
PAC-2 PATRIOT Advanced Capability-2
PAC-2/-3 PATRIOT Advanced Capability, Level 2/Level 3. Formerly called ERINT.
PAC-3 PATRIOT Advanced Capability-3
PAC-3 SIM PAC-3 Simulation (PATRIOT), Huntsville, AL.
PAC-4 PATRIOT Advanced Capability-4.
PACA Professional Aerospace Contractors Association.
PACAF [United States} Air Forces Pacific.
PACBAR Pacific [Radar] Barrier.
pacemaker (PAYS-may-ker) An electronic device that is implanted in the body to monitor heart rate and rhythm.
PACFLT Pacific Fleet (US).
pachynema A mid-prophase stage in the first meiotic division, between zygonema and diplonema. Chromosomes appear as long, paired threads.
pachytene (adj.) See: pachynema.
Pacific Decadal Oscillation (Abbrev. PDO) - a recently described pattern of climate variation similar to ENSO though on a timescale of decades and not seasons.
Pacific flyway An established air route of migratory birds along the west coast of the United States.
Pacific valerian A plant whose roots are used as a sedative and to treat certain medical conditions.
Pacifica A code name for AMD's version of virtualization assist, included in some 64-bit AMD processors. See AMD Virtualization.
Pacifica, AMD See virtualization hardware assist.
Pack slip A lateral slip of selected tape windings causing high or low spots (when viewed with tape reel laying flat on one side) in an otherwise smooth tape pack.
pack year A way to measure the amount a person has smoked over a long period of time. It is calculated by multiplying the number of packs of cigarettes smoked per…
package A group of files that modify Windows features. Package types include service packs, security updates, language packs, and hotfixes.
package access See package.
package alert Time at which a message is sent indicating a problem with a package.
package declaration A declaration used to name a package. This must be the first item in a source file, preceding any import statements. For instance, package java.lang;
package event A package condition such as a failure that causes a notification message to be sent. Package events can be accompanied by alerts, but not alarms.
package recovery group A set of one or more packages with a mapping between their instances on the cluster and their instances on the Recovery Cluster.
Package Tour A saleable travel product offering an inclusive price with several travel elements that would otherwise be purchased separately.
Packager Anyone organizing a tour including prepaid transportation and travel services, usually to more than one destination.
packaging cell line A cell line designed to produce viral particles that do not contain nucleic acid.
Packaging, Handling, Storage, and Transportation (PHS&T) The resources, processes, procedures, design considerations, and methods to ensure that all system, equipment, and support items are preserved, packaged…
PackBits A compression scheme which originated with the Macintosh. Suitable only for black & white.
packed cell volume (Abbreviation: PCV). The proportion of a cell culture volume that is occupied by cells.
Packet A unit of data sent across a network which may contain identify and routing information.
packet assembler/disassembler (PAD) A functional unit that enables data terminal equipment (DTE) not equipped for packet switching to access a packet-switched network.
packet entry event A packet layer reference event that corresponds to a packet entering a network section (from a circuit section) or a packet entering a DTE (from an access…
packet exit event A packet layer reference event that corresponds to a packet exiting a network section (to a circuit section) or a packet exiting a DTE (to an access…
packet filter A type of firewall in which each packet is examined and either allowed to pass through or is rejected, based on local security policy. [INFOSEC-99]
packet filtering The action a device takes to selectively control the flow of data to and from a network.
packet format The structure of data, address, and control information in a packet. Note: The size and content of the various fields in a packet are defined by a set of…
packet header A header consisting of octets 4 to 8 (inclusive) of the frame (flags excluded from the octet numbers). [After T1.509-1995]
packet Internet groper See ping.
packet layer reference event The event that occurs when a packet crossing a section boundary changes the state of the packet layer interface. [T1.504-1989]
packet mode A mode of operating a communications network in which packet switching is used rather than message switching. [From Weik '89]
Packet Protocol/Packetized SCSI This Ultra320 SCSI feature speeds the transfer of data, command, and status packets over earlier generations of SCSI.
Packet Sniffer Software that observes and records network traffic.
packet stream A collection of logical links multiplexed together onto one physical channel between two endpoints of the wideband packet network. [T1.509-1995]
packet switching The process of routing and transferring data by means of addressed packets so that a channel is occupied during the transmission of the packet only, and…
Packet Switching (PSW) A data transmission process, utilizing addressed packets, whereby a channel is occupied only for the duration of transmission of the packet.
packet trace A facility for tracing network traffic that is directed to a filer. See also "network trace."
packet transfer mode A method of information transfer, by means of packet transmission and packet switching, that permits dynamic sharing of network resources among many…
packet-mode terminal Data terminal equipment (DTE) that can control, format, transmit, and receive packets.
packet-switched data transmission service A service that (a) provides for the transmission of data in the form of packets, (b) switches data at the packet level, and (c) may provide for the…
packet-switching network A switched network that transmits data in the form of packets.
packet-switching node In a packet-switching network, a node that contains data switches and equipment for controlling, formatting, transmitting, routing, and receiving data…
packetization interval Defines the duration of the sampled speech of the access channel that has been collected, coded, and packetized.
Packing Factor The ratio of solar collector array area to actual land area.
paclitaxel (PA-klih-TAK-sil) A drug used to treat breast cancer, ovarian cancer, and AIDS-related Kaposi sarcoma.
paclitaxel albumin-stabilized nanoparticle formulation (PAK-lih-TAK-sil al-BYOO-min-STAY-bih-lized NA-noh-PAR-tih-kil for-myoo-LAY-shun) A drug used to treat breast cancer that has spread or that has come back…
paclitaxel liposome (PA-klih-TAK-sil LY-poh-SOME) A form of the anticancer drug paclitaxel that is contained in very tiny, fat-like particles.
paclitaxel poliglumex (PA-klih-TAK-sil PAH-lee-GLOO-mex) A form of the anticancer drug paclitaxel combined with a protein called poliglumex that may have fewer side effects and…
paclitaxel polyglutamate (PA-klih-TAK-sil PAH-lee-GLOO-tuh-mayt) A form of the anticancer drug paclitaxel combined with a protein called poliglumex that may have fewer side…
PACOM U.S. Pacific Command.