supervisory signalingSpecific electrical conditions (called "on-hook" and "off-hook") at the NI (network interface) that are used to control call states and processes. [T1.
supervisory signalsSignals used to indicate, or to indicate and control, the various operating states of the circuits or circuit combinations involved in a particular…
Supplemental AppropriationBudget authority provided in an appropriations act in addition to regular or continuing appropriations already provided.
Supplemental PagesPages which are indexed in Google but do not exist at this time. But during searching for a particular thing they are shown in the search result pages.
Supplemental ResultsDocuments which generally are trusted less and rank lower than documents in the main search index.
SupplyThe availability of services or goods at centers. An example of a type of supply is the availability of milk at grocery stores, cars at a car dealer, or…
Support EquipmentAll system equipment required to support the ground and flight phases of the mission.
Support PersonnelIndividuals, in addition to operators, trainers, and maintainers, who are directly associated with an operational system(s), and who are critical to its…
Support SoftwareSoftware that aids in the development or maintenance of other software, for example compilers, loaders, and other utilities.
supported AMIAn Amazon Machine Image similar to a paid AMI, except that the owner charges for additional software or a service that customers use with their own AMIs.
supportive security applicationSpecific type of application that provides security services or security management capabilities at application level rather than embedded in the…
suppressed carrier single-sideband emissionA single-sideband emission in which the carrier is virtually suppressed and not intended to be used for demodulation. [NTIA] [RR]
suppressed carrier transmissionAmplitude modulation (AM) transmission in which the carrier level is reduced below that required for demodulation.
SuppressionTemporary or transient degradation of the performance of a weapons system, below the level needed to fulfill its mission objectives, by an opposing force.
suppression measure[An] Action, procedure, modification, or device that reduces the level of, or inhibits the generation of, compromising emanations in an information system…
surfSlang. To search the Web, by navigating in a nonlinear and seemingly random way, often without a specific objective.
surfaceA geographic phenomenon represented as a set of continuous data, such as elevation or air temperature over an area.
surface dataInformation about variations in the surface of the Earth that are referenced to a known coordinate system and vertical datum.
surface modelDigital abstraction or approximation of a surface. Because a surface contains an infinite number of points, some subset of points must be used to…
surface refractivityThe refractive index of the Earth's atmosphere, calculated from observations of pressure, temperature, and humidity at the surface of the Earth.
surface waveA wave that is guided along the interface between two different media or by a refractive index gradient.
Surge ProductionAn increased rate of production necessary to meet demands for defense items due to a need for accelerated production to meet a threat or for a wartime or…
surge protective device (SPD)An assembly of one or more components intended to limit or divert surges; the device contains at least one nonlinear component. [T1.
Surveillance(ser-VAY-lents) In medicine, the ongoing collection of information about a disease, such as cancer, in a certain group of people.
Surveillance RequirementsRequirements are requests for surveillance, including relative priorities for coverage and sensitivity levels, based on operational orders, selected…
Surveillance System ConfigurationThe sensor types and locations and the modes of operation currently activated in the surveillance system. 283
Surveillance, Satellite and MissileThe systematic observation of aerospace for the purpose of detecting, tracking, and characterizing objects, events, and phenomena associated with…
SurveyA precise measurement of a property by a licensed surveyor, showing legal boundaries of a property and the dimensions and location of improvements.
survivabilityA property of a system, subsystem, equipment, process, or procedure that provides a defined degree of assurance that the named entity will continue to…
Survivability Operating ModesThe operating modes not including but in addition to the self-defense modes that all the elements can use to protect themselves against direct enemy…
survival craft stationA mobile station in the maritime mobile service or the aeronautical mobile service intended solely for survival purposes and located on any lifeboat…
susceptibilityIn electronic warfare, the degree to which electronic equipment is affected by electromagnetic energy radiated by an enemy's equipment, such as jamming…
susceptibility threshold1. The amount of undesired signal power required at the input terminals of a receiver to cause barely perceptible interference at the receiver output…
susceptivenessIn telephone systems, the extent to which circuits pick up noise and low-frequency energy by induction from power systems.
sweep acquisitionA technique whereby the frequency of the local oscillator is slowly swept past the reference in order to assure that the pull-in range is reached.
Sweep JammingA narrow band of jamming that is back and forth over a relatively wide operating band of frequencies.
swimSlow, graceful, undesired movements of display elements, groups, or images about their mean position on a display surface, such as that of a monitor.
SwingThe Swing classes are part of a wider collection known as the Java Foundation Classes (JFC). Swing classes are defined in the javax.swing packages.
switchA Java keyword used to evaluate a variable that can later be matched with a value specified by the case keyword in order to execute a group of statements.
switch busy hourIn telephony, the busy hour for a single switch.
switch clusterThe combination of multiple command-line switches (e.g., -a -b -c) into one switch (e.g., -abc).
switch statementA selection statement in which the value of an arithmetic expression {expression!arithmetic} is compared for a match against different case labels.
switchboardEquipment used for manual switching operations.
switched access lineA communication path between local exchange and a customer interface (CI). [T1.401-1988]
switched circuitIn a communications network, a circuit that may be temporarily established at the request of one or more of the connected stations.
Switched Digital Acceptance Testing (SDAT)Describes acceptance testing procedures used when Switched Access Services are provided with a digital switch on digital facilities.
switched exchange access networkThe network of switching systems, interconnecting facilities, and equipment provided by an exchange carrier (EC) to provide telecommunications services…
switched loopIn telephony, a circuit that automatically releases a connection from a console or switchboard, once the connection has been made to the appropriate…
switched multimegabit data services (SMDS)A connectionless, broadband, packet-switched data service that provides LAN-like performance and features in metropolitan or wide areas.
switched networkA communications network, such as the public switched telephone network, in which any user may be connected to any other user through the use of message…
switched virtual circuit (SVC)An ATM network connection established through signaling. The user defines the endpoints when the call is initiated.
switchingThe controlling or routing of signals in circuits to execute logical or arithmetic operations or to transmit data between specific points in a network.
switching centerIn communications systems, a facility in which switches are used to interconnect communications circuits on a circuit-, message-, or packet-switching…
syllabary[A] list of individual letters, combination of letters, or syllables, with their equivalent code groups, used for spelling out words or proper names not…
syllableA character string or a bit string in a word.
symbolA graphic pattern used to represent a feature. For example, line symbols represent arc features; marker symbols, points; shades symbols, polygons; and…
symbol environmentDefines the types of map symbols and their characteristics during a graphic display session in ARC/INFO.
symbol tableWhere a "compiler" remembers symbols. A program like Perl must somehow remember all the names of all the variables, filehandles, and subroutines you've…
symbolic debuggerA program that lets you step through the execution of your program, stopping or printing things out here and there to see whether anything has gone wrong…
symbolic languageA computer programming language used to express addresses and instructions with symbols convenient to humans rather than to machines.
symbolic linkAn alternate filename that points to the real "filename", which in turn points to the real "file".
symbolic logicThe discipline in which valid arguments and operations are dealt with using an artificial language designed to avoid the ambiguities and logical…
symbolic referenceA variable whose value is the name of another variable or subroutine. By dereferencing the first variable, you can get at the second one.
SymCLIThe Symmetrix command line interface used to configure and manage EMC Symmetrix disk arrays.
symlinkA file system object that can be used to redirect a path transparently to another part of the file system. Also known as "symbolic link" or "soft link."
symmetric authentication methodMethod for demonstrating knowledge of a secret, in which both entities share a common authentication information [10181-2].