ClearanceClearance is the first half of the process that completes your order to buy or sell a security.
ClearingThe registration and settlement of a trade that includes provisions for margin requirement and performance guarantee.
cleaveTo break phosphodiester bonds of double-stranded DNA, usually with a type II restriction endonuclease. Synonyms: cut; digest.
CLECAbbreviation for competitive local exchange carrier. The new local exchange carrier that is attempting to compete outside its traditional operating…
CLEMENTINEA flight program to demonstrate lightweight spacecraft technologies.
CLEOConference on Lasers and Electro-Optics (See EQEC).
click dataData obtained by analyzing the log file containing information regarding who has accessed the Web page or the banner under consideration.
click rateOf a Web page menu item, especially an advertisement, the ratio of (a) the number of time it is selected ("clicked") to (b) the number of times it is…
Click throughThe process of clicking on a link in a search engine output page to visit an indexed site.
Click-down Ad or Click-within AdAn ad that allows the user to stay on the same web page, while viewing requested advertising content.
Click-Through Rate (CTR)Measures how many people of one hundred clicked on a link in an email on average.
ClickthroughThe action of clicking an ad element and causing a redirect to another web page.
Clickthrough ratethe rate at which people click on a link such as a search engine listing or a banner ad.
clientAny computer system that requests a service of another computer system. A workstation requesting the contents of a file from a file server is a client of…
Client (Application)A system entity, usually a computer process acting on behalf of a human user, that makes use of a service provided by a server.
Client Access server roleA set of components and services that enable users to access their Exchange mailboxes through the application Outlook Web Access and the protocols…
client account partner discovery Web pageThe Web page that is used to interact with a user to determine which account partner the user belongs to when Active Directory Federation Services (ADFS)…
client authentication certificateIn AD FS, a certificate that federation server proxies use to authenticate a client to the Federation Service.
client certificateAn electronic stamp that contains a public key, a name, an expiration date, and a digital signature.
client IDA unique identification number used when sending data to a specific client. Clients that are standardized for use in generic applications are allocated…
client logoff Web pageWhen Active Directory Federation Services (ADFS) performs a logoff operation, a Web page that is executed to provide visual feedback to the user that the…
client logon Web pageWhen AD FS collects client credentials, a Web page that is executed to perform the user interaction.
client reconnectUsers access to the backup site after failover. Client reconnect can be transparent, where the user is automatically connected to the application running…
client-certificate authenticationAn authentication mechanism that uses HTTP over SSL, in which the server and, optionally, the client authenticate each other with a public key certificate…
client-config.wsddAxis client-side WSDD configuration file. It contains information about the type mappings, the transport and other handlers.
client-server architectureThe structural basis of Exchange. The client sends requests to a server, and the server carries out the instructions. [Exchange 5.5]
Client/ServerAn architecture whereby a computer system consists of one or more server computers and numerous client computers (workstations).
client/server transferIn a client/server transfer, there are only two entities involved in the transfer, the client entity and the server entity.
cliff effectIn the digital transmission of analog signals, including analog television and digital audio broadcasting (DAB), a signal-quality effect in which the…
climate controlmanagement of temperature and humidity where records are stored See also environmental control.
Clinger-Cohen Act of 1996Also known as Information Technology Management Reform Act. A statute that substantially revised the way that IT resources are managed and procured…
clipThe spatial extraction of those features from one coverage that reside entirely within a boundary defined by features in another coverage (called the clip…
clipper1. A circuit or device that limits the instantaneous output signal amplitude to a predetermined maximum value, regardless of the amplitude of the input…
clippingIn telephony, the loss of the initial or final parts of a word, words, or syllable, usually caused by the nonideal operation of voice-actuated devices. 2.
cliticA word that syntactically functions separately but is phonetically connected to another word.
CLLI™A CLLI⢠Location Identification Code is an eleven-character alphanumeric descriptor used to identify switches, points of interconnection, and…
CloakingThe hiding of page content. Normally carried out to stop page thieves stealing optimized pages. See also Bait-and-Switch.
clockA reference source of timing information. 2. A device providing signals used in a transmission system to control the timing of certain functions such as…
clock accuracyThe level of agreement of the frequency of a clock with the ideal frequency. This is specified as the magnitude of the fractional frequency offset from…
clock errorThe difference between local clock time or value and a designated reference clock time or value.
clock fast modeAn operating condition of a clock in which it is locked to an external reference and is using time constants that are altered to quickly bring the local…
clock free-run modeAn operating condition of a clock in which its local oscillator is not locked to an external synchronization reference, and is using no storage techniques…
clock holdover modeAn operating condition of a clock that has lost its controlling input and is using stored data, acquired while in normal operation, to control its output.
clock normal modeAn operating condition of a clock in which the output signals are controlled by an external input reference. It is the expected mode.
clock phase slewThe rate of relative phase change between a given clock signal and a stable reference signal.
clock rateThe rate at which a clock issues timing pulses. Note: Clock rates are usually expressed in pulses per second, such as 4.96 Mp/s (megapulses per second).
clock toleranceThe maximum permissible departure of a clock indication from a designated time reference such as Coordinated Universal Time (UTC).
clock trackA track on which a pattern of signals is recorded to provide a timing reference.
cloned configurationThe practice of deploying new Edge Transport servers based on the configuration information of a previously configured source server.
closed captioningIn broadcast and cable television, the insertion, into the blank lines between frames, of information that may be decoded and displayed on the screen as…
closed circuitIn radio and television transmission, pertaining to an arrangement in which programs are directly transmitted to specific users and not broadcast to the…
closed fileA file on which action has been completed and to which documents are unlikely to be added
closed recordany record that is deliberately protected from public inspection for any reason. See confidential record. See also open record.
closed user groupIn a network, a group of users permitted to communicate with each other but not with users outside the group.
closed user group with outgoing accessA closed user group in which at least one member of the group has a facility that permits communication with one or more users external to the closed user…
closed waveguideAn electromagnetic waveguide (a) that is tubular, usually with a circular or rectangular cross section, (b) that has electrically conducting walls, (c)…
Closed World AssumptionPresumption stating that the statements we have are the only statements that need be considered.
closed-loop noise bandwidthThe integral, over all frequencies, of the absolute value of the closed-loop transfer function of a phase-locked loop.
closed-loop response integrityIn cryptography, the originator's confirmation of the integrity of the entire transaction, i.e.
closed-loop transfer functionA mathematical expression (algorithm) describing the net result of the effects of a closed (feedback) loop on the input signal to the circuits enclosed by…
closed-security environmentAn environment in which special attention is paid (in the form of authorizations, security clearances, configuration controls, etc.
Closed-set IdentificationA biometric task where an unidentified individual is known to be in the database and the system attempts to determine his/her identity.
Closely Spaced Objects (CSO)Entire or partial object clusters that cannot be resolved to individual objects due to their close proximity and/or exceeding the sensor resolution…
closureIn transportation, the process of a unit arriving at a specified location. It begins with the arrival of the first element at a designated location and…
cloud appa software application that is never installed on a local machine - it's always accessed over the Internet.
cloud arcsshort for cloud architectures. Designs for software applications that can be accessed and used over the Internet.
Cloud as a Service (CaaS)a cloud computing service that has been opened up into a platform that others can build upon.
cloud attenuationIn the transmission of electromagnetic signals, attenuation caused by absorption and scattering by water or ice particles in clouds.
cloud bridgerunning an application in such a way that its components are integrated within multiple cloud environments (which could be any combination of…
cloud clientcomputing device for cloud computing. Updated version of thin client.
cloud computingProvides users access to IT-related capabilities (infrastructure and/or applications) "as a service" without regard for the underlying technology or…
Cloud EnablerA general term that refers to organizations (typically vendors) who are not cloud providers per se, but make available technology, such as cloudware, that…
cloud envyused to describe a vendor who jumps on the cloud computing bandwagon by rebranding existing services.
Cloud PortabilityThe ability to move applications (and often their associated data) across cloud computing environments from different cloud providers, as well as across…
Cloud ProviderAn organization that makes a cloud computing environment available to others, such as an external or public cloud.
cloud serverA "server" is simply an operating system leveraging the pool of CPU and Ram resources available from the underlying physical hardware also referred to as…
Cloud Service Architecture (CSA)A term coined by Jeff Barr, chief evangelist at Amazon Web Services. The term describes an architecture in which applications and application components…
Cloud SpanningRunning an application in a way that its components straddle multiple cloud environments (which could be any combination of internal/private and…
cloud storagejust what it says) Sometimes compared to leasing a car - you'll have monthly payments but hopefully you'll always have the lastest/greatest technology.
Cloud-Oriented Architecture (COA)An architecture for IT infrastructure and software applications that is optimized for use in cloud computing environments.
cloudburstwhat happens when your cloud has an outage or security breach and your data is unavailable.
Cloudburst (negative)The failure of a cloud computing environment due to the inability to handle a spike in demand.
Cloudburst (positive)The dynamic deployment of a software application that runs on internal organizational compute resources to a public cloud to address a spike in demand.
cloudcentera large company, such as Amazon, that rents its infrastructure.
CloudFormationAllows developers and systems administrators to easily create and manage a group of related AWS resources by provisioning and updating them in an…
CloudsourcingLeveraging services in the network cloud to provide external computing capabilities, often to replace more expensive local IT capabilities.
cloudstormconnecting multiple cloud computing environments. Also called cloud network.
CloudstormingThe act of connecting multiple cloud computing environments.
CloudwareA general term referring to a variety of software, typically at the infrastructure level, that enables building, deploying, running or managing…
CloudWatchA tracking service which allows developers and administrators to minitor resource utilization, application performance, and operational health.
CLS(1) Command and Launch Station. (2) Contractor Logistic Support.