Point Defense SystemA terminal defense system using radars and large numbers of guided projectiles to defend ICBMs. This concept was considered in the early 1980s.
point of accessA subscriber's entrance to the telecommunications network. A logical view of this point of access has a relationship with the termination point as defined…
point of interface (POI)In a telecommunications system, the physical interface between the local access and transport area (LATA) access and inter-LATA functions.
Point of Presence (POP)A remote location that provides network connectivity back to the core of the network for users within its service area.
point of termination (POT)The point of demarcation between (exchange) carriers that establishes the technical interface, test points, and division of operational responsibility.
point of trainIn infrared transmission systems, a steady infrared light that is used (a) to assist the transmitter in locating a receiving station and (b) for keeping…
Point sourceAny discernible, confined, or discrete conveyance from which pollutants are or may be discharged, including, but not limited to, any pipe, ditch, channel…
point-in-polygonA topological overlay procedure which determines the spatial coincidence of points and polygons.
point-to-multipoint connectionA distinctive type of multipoint connection, composed of a central connection endpoint (central CE) and other, peripheral, CEs, and in which data…
Point-to-PointDirect connection between the backplane and the storage device, allowing for the high-performance, full utilization of bandwidth.
point-to-point configurationA configuration where there are only two access points. [T1.620-1991] 2. A communication circuit having only two nodes.
point-to-point messaging systemA messaging system built on the concept of message queues. Each message is addressed to a specific queue; clients extract messages from the queues…
PointerA pointer is an index entry in the directory of a disc (or other storage medium) that identifies the space on the disc in which an electronic document or…
pointersA single octet that indicates the beginning of each mandatory variable parameter and optional part. [TI.110-1987]
PointingThe treatment of joints between bricks, stone, or other masonry components by filling with mortar; also, called tuck-pointing
poison message queueA persistent queue that isolates messages that are detected as potentially fatal to an Exchange Server 2007 server. This queue is typically empty.
poison queueQueue to isolate messages that are detected as potentially harmful to the Exchange 2007 system after a server failure.
Poison WordWords which were traditionally associated with low quality content that caused search engines to want to demote the rankings of a page.
Poisson distributionA mathematical statement of the probability that exactly k discrete events will take place during an interval of length t, expressed by where k is a…
polar operationA telegraph system in which marking signals are formed by current or voltage pulses of one polarity and spacing signals by current or voltage pulses of…
polar orbitAn orbit for which the angle of inclination is 90o. Note: A satellite in polar orbit will pass over both the north and south geographic poles once per…
polar relayA dc relay in which the direction of movement of the armature depends on the direction of the current flow.
polarential telegraph systemA direct-current telegraph system employing polar transmission in one direction and a form of differential duplex transmission in the other.
polarizationOf an electromagnetic wave, the property that describes the orientation, i.e., time-varying direction and amplitude, of the electric field vector.
polarization diversityDiversity transmission and reception wherein the same information signal is transmitted and received simultaneously on orthogonally polarized waves with…
polarization-maintaining (PM) optical fiberAn optical fiber in which the polarization planes of lightwaves launched into the fiber are maintained during propagation with little or no cross-coupling…
Police DistrictPolice jurisdictions. See also Police Service Areas (PSA).
Police Service Area (PSA)Every resident lives in a Police Service Area, and every PSA has a team of police officers and officials assigned to it.
PolicyThe contract form issued by the company to explain the coverage provided. It is a legal document.
Policy Management Authority (PMA)Body established to oversee the creation and update of Certificate Policies, review Certification Practice Statements, review the results of CA audits for…
policy manualA publication that states the course of action to be followed by an organization, unit, or department in conducting its activities.
Policy MappingRecognizing that, when a CA in one domain certifies a CA in another domain, a particular certificate policy in the second domain may be considered by the…
policy, folder policyRestrictions placed on a folder or other object that limit access to it, or that limit operations that can be performed on the object.
policy-based automationpolicies automate resource management based on business-defined conditions such as time of day, trouble alarms, and capacity or availability issues by…
Policy-based ManagementA method of managing system behavior or resources by setting "policies" (often in the form of "if-then" rules) that the system interprets.
Politeness WindowIn order not to overburden any particular server, most search engine spiders limit their access to each server.
pollingThe process of repeatedly testing until a condition becomes true. Polling can be inefficient if the time between tests is short compared with the time it…
polygonA coverage feature class used to represent areas. A polygon is defined by the arcs that make up its boundary and a point inside its boundary for…
polygon overlayA topological overlay procedure which determines the spatial coincidence of two sets of polygon features and creates a new set of polygons based on…
polygon-arc topologyThe topological data structure ARC/INFO uses to represent connectivity between arcs to form polygons.
polyinstantiationIn cryptography, the existence of a cryptographic key in more than one secure physical location. [After X9.49]
polymer(PAH-lih-mer) A molecule made up of small identical molecules called monomers. The monomers are joined together in a repeating pattern.
POMCUSPre-positioning Of Materiel Configured to Unit Sets.
PoolingCombining of assets of different entities, i.e., two or more counties, for efficient investment purposes while maintaining separate accounting trails.
Pooling Administrator (PA)The term Pooling Administrator refers to the entity or entities responsible for administering a thousands-block number pool (FCC 00-104, ç 52.
POPContraction of "Repopulation", often used as a shortened term for the re-spawn of monsters.
Pop-underA pop-up that appears underneath the currently active web browser window. An annoying, if not shady, tactic used by some web advertisers.
Pop-upA web page that displays within a new, typically smaller, web browser window, rather than the currently active browser window.
POP3This is a computing standard that enables emails to be retrieved from a remote mailbox.
POP3 (Post Office Protocol version 3)A mail protocol that allows clients running it to retrieve mail from a host mail server also running the protocol. You can enable POP3 on a Domino server.
Popped strandA strand of tape protruding from the edge of a wound tape pack. Print through: The condition where low frequency signals on one tape winding imprint…
popular rankingA ranking type that adds to a document's existing ranking based on the document's popularity.
Populationthe totality of items or units of material under consideration.
popup menuA menu of actions that is normally not visible on the screen until a mouse button is clicked.
PortAn implanted device through which blood may be withdrawn and drugs may be infused without repeated needle sticks. Also called port-a-cath.
Port CoversMechanism for thrust termination of solid-propellant systems.
port operations serviceA maritime mobile service in or near a port, between coast stations and ship stations, or between ship stations, in which messages are restricted to those…
Port ScanningUsing a program to remotely determine which ports on a system are open (e.g., whether systems allow connections through those ports).
port stationA coast station in the port operations service. [NTIA] [RR]
PortabilityPortability is a provision of the INA intended to preserve the legal status of an H-1B worker who is already in the U.S.
portablePortability is the quality of a program that makes it possible to run it on different types of computers.
Portable Batch System (PBS)A job scheduler mechanism supported by GRAM. For more information, see http://www.openpbs.org.
portable station1. A station capable of being carried by one or more persons. Note: A portable station usually has a self-contained power source and can be operated while…
Portal SiteA generic term for any site which provides an entry point to the internet for a significant number of users.
porterSomeone who "carries" software from one "platform" to another. Porting programs written in platform-dependent languages such as C can be difficult work…
Portrait ModeA display where the height exceeds the width.
PoseidonClass of US nuclear ballistic submarines (USN term).
positioned channelIn integrated services digital networks (ISDN), a channel that occupies dedicated bit positions in the framed data stream.
positioned interface structureWithin a framed interface, a structure in which positioned channels provide all services and signaling.
PositioningThe process of ordering web sites or web pages by a search engine or a directory so that the most relevant sites appear first in the search results for a…
Positioning TechniqueA method of modifying a web page so that search engines (or a particular search engine) treat the page as more relevant to a particular query (or a set of…
positive control material[A] generic term referring to a sealed authenticator system, permissive action link, coded switch system, positive enable system, or nuclear command and…
positive feedbackthe process in which an initial change will bring about an additional change in the same direction.
POSIX 1003.1AA revision to the POSIX 1003.1 standard that defines a set of standard operating system interfaces and an environment for application programs written in…
POSIX 1003.4aDefines thread support to facilitate writing multitasking operations, particularly server applications.
POSIX character setPOSIX character sets support languages which only require 7-bit characters (such as US English). See also extended character set.
POSIX Open System Environment (POSIX OSE)The Open System Environment in which the standards included are not in conflict with ISO/IEC 9945 and are: - International Standards and Profiles…
POSIX Standardized Profile (POSIX SP)A standardized Profile that specifies the application of certain POSIX base standards in support of a class of applications and does not require any…
possible ownerA node in a failover cluster or server cluster that can run a specific resource.