Technology terms starting with P

1,398 terms

PDS Particularly Dangerous Situation (PDS) wording is used in rare situations when long-lived, strong and violent tornadoes are possible.
PDSL Process Data Sensitivity Label.
PDSS Post-Development Software Support (ILS term).
PDU Abbreviation for protocol data unit.
PDUSD Principal Deputy Under Secretary of Defense.
PDUSD (A&T) Principal Deputy Under Secretary of Defense (Acquisition and Technology).
PDV Program Definition and Validation.
PE Program Element.
Peacekeeper US MX Missile.
peak A point around which all slopes are negative (i.e., downward).
peak busy hour Synonym busy hour.
peak emission wavelength Of an optical emitter, the spectral line having the greatest power. Synonym peak wavelength.
peak envelope power (of a radio transmitter) [PEP, pX, PX] The average power supplied to the antenna transmission line by a transmitter during one radio frequency cycle at the crest of the modulation envelope…
Peak Gamma Dose Rate The maximum rate (per second) of gamma radiation that the system could survive and continue functioning.
peak limiting A process by which the absolute instantaneous value of a signal parameter is prevented from exceeding a specified value.
peak power output The output power averaged over that cycle of an electromagnetic wave having the maximum peak value that can occur during transmission.
peak signal level In a transmission path, the maximum instantaneous signal power, voltage, or current at any point. 2.
peak spectral emission See peak emission wavelength.
peak wavelength Synonym peak emission wavelength. 2. Of an optical bandpass filter, the wavelength that suffers the lowest loss. [After FAA]
peak-to-average ratio (p/a r) The ratio of the instantaneous peak value, i.e., maximum magnitude, of a signal parameter to its time-averaged value.
peak-to-peak value The absolute value of the difference between the maximum and the minimum magnitudes of a varying quantity.
PEC (1) Program Element Code. (2) Pre-authorized Engagement Criteria.
pedestal 1.Black level expressed as an offset in voltage or IRE units relative to blanking level. Conventionally, approximately 54 mV (7.
PEELS Parametric Endo- Exo Lethality Simulation.
peer an individual having expertise in a specific functional area or discipline gained through documented training and experience.
peer entity In layered systems, entities in the same layer but in different systems (nodes) that must exchange information to achieve a common objective. [After T1.
peer group In Open Systems Interconnection (OSI)--Architecture, a group of functional units in a given layer of a network in which all the functions performed by the…
peer protocol A formal language used by peer entities to exchange user data. [TI.110-1987].
peer-entity authentication 1. The corroboration that a peer entity in an association is the one claimed. [T1.233-1993] 2.
peg count 1. In communication systems, a count that is made of the number of times that an event or condition occurs. [From Weik '89] 2.
PEIP Programmable Embedded INFOSEC Product (ex-MSD).
PEIS Programmatic Environmental Impact Statement. 222
pel In a facsimile system, the smallest discrete scanning line sample containing only monochrome information, i.e., not containing gray-scale information.
Pellet Open-source Java OWL DL reasoner.
PEM Program Element Monitor (AF).
PENAID Penetration Aid.
Penaid (Penetration Aid) (Formerly an acronym for Penetration Aid.) Techniques or devices employed by offensive aerospace weapon systems to increase the probability of penetrating…
Penalty See Fee
Pending The status of a patent application that occurs before either an application is abandoned (withdrawn) or a patent issues.
pending file File of materials held for further action
penetration The intentional passage, through a building wall or partition, or an equipment enclosure or chassis, of a signal-bearing communications medium, e.g.
penetration test A test of a system which attempts to breach the System Security policy. Also known as "pen-test" [CESG].
Penetration Testing The portion of security testing in which the penetrators attempt to circumvent the security features of the system.
PEO Program Executive Officer.
PEO (SC/AP) Program Executive Officer, Surface Combatants/AEGIS Program.
PEO (TAD) Program Executive Officer, Theater Air Defense. (U.S. Navy)
PEO (TAD)-B Program Executive Officer, U.S. Navy Theater Ballistic Missile Defense Program Office.
PEO-AMD Program Executive Officer, Air and Missile Defense. (U.S. Army)
PEP Producibility Engineering and Planning.
PEPP Producibility Engineering and Production Planning.
Per Device licensing mode A mode in which the terminal server requests a TS Per Device client access license (TS Per Device CAL) from a Terminal Services license server so that a…
Per User licensing mode A mode in which the terminal server requests a TS Per User client access license (TS Per User CAL) from a Terminal Services license server so that a user…
per-call key [A] unique traffic encryption key generated automatically by certain secure telecommunications systems to secure single voice or data transmissions.
percent break In pulsed telephone signaling (dialing), the ratio, expressed in percent, of (a) the open-circuit (break) time to (b) the sum of the open- and…
percentage modulation In angle modulation, the fraction of a specified reference modulation, expressed in percent. 2.
Peregrine An Air Force boost-phase interceptor concept under development at USAF/SMC.
perfect forward secrecy In cryptography, of a key-establishment protocol, the condition in which the compromise of a session key or long-term private key after a given session…
Performance Those operational and support characteristics of the system that allow it to effectively and efficiently perform its assigned mission over time.
performance anomalies A discrepancy between actual and desired characteristics of an item. An anomaly may or may not affect the ability of an item to perform a required…
performance evaluation The technical assessment of a system or system component to determine how effectively operating objectives have been achieved [POSIX.0].
Performance Logs and Alerts A Distributed Component Object Model (DCOM) API that enables application programmers to log system performance and diagnosis data, and to generate alert…
performance management In network management, (a) a set of functions that evaluate and report the behavior of telecommunications equipment and the effectiveness of the network…
performance measurement period The period during which performance parameters are measured. Note: A performance measurement period is determined by required confidence limits and may…
performance parameter A quality, usually quantified by a numerical value, which quality characterizes a particular aspect, capability, or attribute of a system.
performance primitives Basic error events or other performance-related occurrences that may be detected by monitoring a digital signal. [T1.503-1996]
performance reliability The ability of an item to perform a required function under given conditions for a given time period.
Performance Requirement A requirement that specifies a performance characteristic that a system or system or system component must possess; for example, speed, accuracy…
Performance Specification (1) A specification that sets forth the performance requirements for a system or system component. (2) Synonymous with requirements specification.
performance standard A statement of general criteria that define a desired result without specifying the techniques for achieving that result.
periapsis In a satellite orbit, the point that is closest to the gravitational center of the system consisting of the primary body and the satellite.
Perigee The closest distance between moon and earth or the earth and sun.
perigee altitude See altitude of the apogee or of the perigee.
Perimeter Acquisition Radar and Attack Characterization System (PARCS) AN/FPQ-16 phased array radar at Cavalier AFS, ND, used for early warning and attack assessment.
perimeter network An Internet Protocol (IP) network segment that contains resources, such as Web servers and virtual private network (VPN) servers, that are available to…
Period Usually designated by T. This is the time interval of one complete oscillation of any wave. See Wavelength.
Period (nodal) Time for a satellite to travel once around its orbit.
period (of a satellite) The time elapsing between two consecutive passages of a satellite through a characteristic point on its orbit. [NTIA] [RR]
periodic antenna An antenna that has an approximately constant input impedance over a narrow range of frequencies.
periodic transfer process of moving records between active, semiactive, and inactive storage sites on a scheduled basis
periods processing Processing of various levels of classified and unclassified information at distinctly different times.
peripheral device A hardware device not part of the central computer (e.g., digitizers, plotters, and printers).
peripheral devices Devices attached to a computer, such as printers, disk drives, mice, etc.
peripheral equipment In a data processing system, any equipment, distinct from the central processing unit, that may provide the system with additional capabilities.
peripheral node Synonym endpoint node.
periscope antenna An antenna configuration in which the transmitting antenna is oriented to produce a vertical radiation pattern, and a flat or off-axis parabolic…
permanent bond A bond not expected to require disassembly for operational or maintenance purposes.
permanent pen An editing feature that allows users to edit documents in a second font.
permanent record A record that has been determined to have sufficient historical, administrative, legal, fiscal, or other value to warrant continuing preservation
permanent records See archives.
permanent retention retention of a record indefinitely, for centuries rather than mere decades.
permanent signal (PS) An extended off-hook condition not followed by dialing. 2. A connect signal from the network that has not been followed by network outpulsing within a…
permanent storage A storage device in which stored data are nonerasable.
permanent value that a record is of such enduring usefulness that it justifies the public cost to preserve it in an archival medium such as paper or microfilm, and…
permanent virtual circuit (PVC) A network connection with a static route defined in advance, usually by manual setup.
Permeability The rate at which liquids pass through soil or other materials in a specified direction.
permissible interference Observed or predicted interference which complies with quantitative interference and sharing criteria contained in these [Radio] Regulations or in CCIR…
permission Authorization for a user to perform an action, such as sending e-mail for another user or posting items in a public folder.
permission bits Bits that the "owner" of a file sets or unsets to allow or disallow access to other people.
permissions Authorization to perform operations associated with a shared resource, such as a file, directory, or printer.
permuter [A] device used in crypto-equipment to change the order in which the contents of a shift register are used in various nonlinear combining circuits.