Overlay BMD SystemAn advanced exoatmospheric defense system oriented toward defense of ICBMs, consisting of missile-borne, passive infrared sensors and non-nuclear homing…
overlay cellA larger cell that physically overlays one or more smaller cells. For example, intra-building cells may be encompassed by a larger campus cell. [T1.
OverloadTo exceed the design capacity of a device.
overloadingUsing one identifier to refer to multiple items in the same scope. In the Java programming language, you can overload methods but not variables or…
overmodulationThe condition that prevails when the instantaneous level of the modulating signal exceeds the value necessary to produce 100% modulation of the carrier.
overrideTo preempt, manually or automatically, a prescribed procedure. Note: For example, one might manually override a prescribed course of action programmed to…
overridingProviding a different implementation of a method in a subclass of the class that originally defined the method.
overriding for breadthA form of method overriding in which the sub class version of a method implements its own behavior within the context of the attributes and behavior of…
overriding for chainingA form of method overriding in which the sub class version of a method checks to see whether it can respond to the message on its own and only calls the…
overriding for restrictionA form of method overriding in which the sub class version of a method calls the super class version first of all and then uses or manipulates the result…
overshootThat portion of an arc digitized past its intersection with another arc. See also dangling arc.
OvertBiometric sample collection where end users know they are being collected and at what location.
overt channel[A] Communications path within a computer system or network designed for the authorized transfer of data. [INFOSEC-99]
overtoneOf a sinusoidal wave, an integral multiple of the frequency, i.e., the fundamental, of the wave, other than the fundamental itself.
OvertureThe company which pioneered search marketing by selling targeted searches on a pay per click basis.
Overture Keyword Selector ToolPopular keyword research tool, based largely on Yahoo! search statistics. Heavily skewed toward commercially oriented searches, also combines singular and…
overwrite procedure[The] Process of writing patterns of data on top of the data stored on a magnetic medium. [INFOSEC-99]
OWL DLOWL-DL is much more expressive than OWL-Lite and is based on Description Logics (hence the suffix DL).
OWL FullOWL-Full is the most expressive OWL sub-language. It is intended to be used in situations where very high expressiveness is more important than being able…
OWL LiteThe syntactically simplest of the three sub-languages of OWL. It is intended to be used in situations where only a simple class hierarchy and simple…
owl:ThingThe class in an OWL ontology that represents the set containing all individuals. All classes in an OWL ontology are subclasses of owl:Thing.
OwnerThe only security principal who has an inherent right to allow or deny permission to access an object.
owner passwordA password that the user sets when the Trusted Platform Module (TPM) is enabled.
Owner PointA map point over a single lot, attributed with information about the owner.
Owner PolygonA single polygon feature class that represents land with taxable information about the owner, taxes, land use, etc.
p × 64In video teleconferencing, pertaining to a family of CCITT (now, ITU-T) Recommendations, where p is a non-zero positive integer indicating the number of…
P2 message headerThe P2 message header contains only the message recipient data that the sender declared to the recipients.
P2V (Physical to Virtual) migrationmigrating an operating system and its installed applications from a physical computer to a virtual machine (or a partition), without modification.
PA&IDProgram 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…
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.
PABXAbbreviation for private automatic branch exchange. See PBX. Note: Use of the term "PBX" is more common than "PABX," regardless of automation.
PACPatent Assistance Center (prior), now the Inventors Assistance Center or IAC, call (toll-free) 1-800-786-9199 or 703-308-4357
Pack slipA 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.
packageA group of files that modify Windows features. Package types include service packs, security updates, language packs, and hotfixes.
package alertTime at which a message is sent indicating a problem with a package.
package declarationA 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 eventA 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 groupA set of one or more packages with a mapping between their instances on the cluster and their instances on the Recovery Cluster.
PacketA 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 eventA 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 eventA 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 filterA 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 filteringThe action a device takes to selectively control the flow of data to and from a network.
packet formatThe 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 headerA header consisting of octets 4 to 8 (inclusive) of the frame (flags excluded from the octet numbers). [After T1.509-1995]
packet layer reference eventThe event that occurs when a packet crossing a section boundary changes the state of the packet layer interface. [T1.504-1989]
packet modeA mode of operating a communications network in which packet switching is used rather than message switching. [From Weik '89]
Packet Protocol/Packetized SCSIThis Ultra320 SCSI feature speeds the transfer of data, command, and status packets over earlier generations of SCSI.
Packet SnifferSoftware that observes and records network traffic.
packet streamA collection of logical links multiplexed together onto one physical channel between two endpoints of the wideband packet network. [T1.509-1995]
packet switchingThe 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 traceA facility for tracing network traffic that is directed to a filer. See also "network trace."
packet transfer modeA method of information transfer, by means of packet transmission and packet switching, that permits dynamic sharing of network resources among many…
packet-mode terminalData terminal equipment (DTE) that can control, format, transmit, and receive packets.
packet-switched data transmission serviceA 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 nodeIn a packet-switching network, a node that contains data switches and equipment for controlling, formatting, transmitting, routing, and receiving data…
packetization intervalDefines the duration of the sampled speech of the access channel that has been collected, coded, and packetized.
paddingIn cryptography, a bit or a string of bits appended to a message either for filtering purposes or to cause the message to contain an even multiple of the…