Technology terms starting with F

915 terms

F 1) Fahrenheit- The standard scale used to measure temperature in the United States.
F layer See F region.
F Region In solar-terrestrial terms, the upper layer of the ionosphere, approximately 120 to 1500 km in altitude.
F/O (1) Fiber Optic. (2) Follow-On.
FA Forecast Area
FA/RD Functional Analysis/Requirements Definition.
FAA Federal Aviation Administration
FAAD Forward Area Air Defense (US Army).
FAAD C2I Forward Area Air Defense Command, Control and Intelligence.
FAADS Forward Area Air Defense System (JCS term).
FAAWC Fleet/Force Anti-Air Warfare Commander.
FAB A product of hydrolysis of an IgG antibody, consisting of the variable region with some of the constant region of a heavy chain, and an entire light chain.
Fabric The hardware that connects workstations and servers to storage devices in a networked storage architecture.
Fac Facility (MILCON term).
Face Recognition A biometric modality that uses an image of the visible physical structure of an individual's face for recognition purposes.
facet erosion In laser diodes, a phenomenon in which a high field intensity of stimulated optical radiation causes degradation of the facets, i.e.
facility A fixed, mobile, or transportable structure, including (a) all installed electrical and electronic wiring, cabling, and equipment and (b) all supporting…
Facility and Structure Manmade construction. For example, resources describing buildings, fences, and related items.
facility assembly A group of interconnected equipment and transmission media uniquely identified and dedicated to a specific type of service. [T1.238-1994/97]
facility code A two-digit code (FC) used in the exchange-carrier-to-interexchange carrier (EC-to-IC) facility/service selective signaling protocol and the IC-to-EC…
facility grounding system The electrically interconnected system of conductors and conductive elements that (a) provides multiple current paths to the earth electrode subsystem…
facility group The particular group of facilities to route the call. [T1.667-1999]
facility group member The specific member of a trunk group or a multi-line hunt group. [T1.667]
FACP Forward Area Control Post (JFACC term).
facsimile An electronic means for transmitting an exact reproduction of an image using communications lines Also referred to as fax.
facsimile (FAX) A form of telegraphy for the transmission of fixed images, with or without half-tones, with a view to their reproduction in a permanent form.
facsimile converter In a facsimile receiver, a device that changes the signal modulation from frequency-shift keying (FSK) to amplitude modulation (AM). 2.
facsimile frequency shift At any point in a frequency-shift facsimile system, the numerical difference between the frequency that corresponds to a white signal and the frequency…
facsimile picture signal In facsimile systems, the baseband signal that results from the scanning process.
facsimile receiver In a facsimile system, the equipment that converts the facsimile picture signal into a recorded copy.
facsimile recorder In a facsimile receiver, the device that performs the final conversion of the facsimile picture signal to an image of the object, i.e.
facsimile signal level In a facsimile system, the signal level at any point in the system. Note 1: The facsimile signal level is used to establish the operating levels.
facsimile transceiver In a facsimile system, the equipment that sends and receives facsimile signals.
facsimile transmission The electronic transmission by wire of document images for reproduction at remote locations having compatible equipment.
facsimile transmitter In a facsimile system, the equipment that converts the baseband picture signals, i.e.
FACSPMF Federal Agency Computer Security Program Managers Forum.
factory pattern A pattern of class definition that is used as a generator of instances of other classes.
FAD See: flavin adenine dinucleotide.
Fade this means to cover all or part of the bank bet, also called cover or cover the bank.
fade margin A design allowance that provides for sufficient system gain or sensitivity to accommodate expected fading, for the purpose of ensuring that the required…
FADEC Full-Authority Electronic Controls.
fading In a received signal, the variation (with time) of the amplitude or relative phase, or both, of one or more of the frequency components of the signal.
fading distribution The probability distribution that signal fading will exceed a given value relative to a specified reference level.
fading margin Synonym fade margin.
FAFB Falcon AFB, CO.
FAFBR Falcon AFB Regulation
fail See failure, graceful degradation.
fail safe Of a device, the capability to fail without detriment to other devices or danger to personnel. 2.
fail soft [The] selective termination of affected nonessential processing, when hardware or software failure is determined to be imminent. [INFOSEC-99]
fail-safe operation Operation that ensures that a failure of equipment, process, or system does not propagate beyond the immediate environs of the failing entity. 2.
failback In a failover cluster or server cluster, the process of returning a clustered service or application to its preferred node after the node has failed and…
failback policy A set of parameters that an administrator can set for a failover cluster or server cluster that affect failback operations.
failed A state that applies to a resource or a node in a failover cluster or server cluster.
failed filer The filer in a clustered pair that has ceased operating. It remains the failed filer until giveback succeeds. See also "takeover."
failover A cluster's ability to redirect requests from one server to another. Failover occurs when a user tries to access an application on an unavailable server…
failover cluster A group of computers, known as nodes, or terminal servers working together as a single system to ensure that mission-critical applications and resources…
Failover Cluster Management snap-in A Microsoft Management Console snap-in (graphical user interface) through which you can configure a failover cluster and its nodes, its clustered services…
Failure An incident resulting in the uncontrolled release of water from a dam. Destroyed and made useless, ceases to function as a dam.
failure access [An] Unauthorized access to data resulting from a hardware or software failure. [INFOSEC-99]
failure control [The methods] used to detect imminent hardware or software failure and provide fail safe or fail soft recovery. [INFOSEC-99]
Failure to Acquire (FTA) Failure of a biometric system to capture and/or extract usable information from a biometric sample.
Failure to Enroll (FTE) Failure of a biometric system to form a proper enrollment reference for an end user.
fair queuing The controlling of congestion in gateways by restricting every host to an equal share of gateway bandwidth.
Fair Use The stated exceptions of allowed usage of work under copyright without requiring permission of the original copyright holder.
Fairing Structure to protect the payload during ascent phase.
FAIT A fact; an act committed; a deed.
Fake Copy Listings Sometimes a malicious company will steal a web page or the entire contents of a web site, re-publish at a different URL and register with one or more…
fake sector In information assurance, a sector consisting of a header but no data, used in large numbers on a diskette to cause an unauthorized copying program to…
FALCON Fission-Activated Light Concept.
fall time The time required for the amplitude of a pulse to decrease (fall) from a specified value (usually 90 percent of the peak value exclusive of overshoot or…
fallback action The action that an Exchange Server 2007 transport rule takes if a disclaimer cannot be applied to an e-mail message as, for example, when a message is…
false In Perl, any value that would look like "" or "0" if evaluated in a string context.
False Acceptance When a biometric system incorrectly identifies an individual or incorrectly verifies an impostor against a claimed identity
False Acceptance Rate The probability that a biometric system will incorrectly identify an individual or will fail to reject an impostor.
False Acceptance Rate (FAR) A statistic used to measure biometric performance when operating in the verification task.
False Alarm Rate (FAR) A statistic used to measure biometric performance when operating in the open-set identification (sometimes referred to as watchlist) task.
false character See illegal character.
false clock A condition where a phase-locked loop controlling a clock locks on a frequency other than the correct frequency.
False Drop A web page retrieved from a search engine or directory which is not relevant to the query used.
false lock A condition where a phase-locked loop locks to a frequency other than the correct one, or to an improper phase.
False Match Rate A statistic used to measure biometric performance when. Similar to the False Acceptance Rate (FAR).
False Match Rate (FMR) Alternative to False Acceptance Rate. Used to avoid confusion in applications that reject the claimant if their biometric data matches that of an…
False Non Match Rate (FNMR) Alternative to False Rejection Rate. Used to avoid confusion in applications that reject the claimant if their biometric data matches that of an applicant.
False Non-Match Rate A statistic used to measure biometric performance. Similar to the False Reject Rate (FRR), except the FRR includes the Failure To Acquire error rate and…
false positive test result that states that an analyte is present, when, in fact, it is not present or, is present in an amount less than a threshold or designated…
False positives When a search returns results that do not contain what was searched for.
False Rejection When a biometric system fails to identify an applicant or fails to verify the legitimate claimed identity of an applicant.
False Rejection Rate (FRR) The probability that a biometric system will fail to identify an applicant, or verify the legitimate claimed identity of an applicant.
FAM Functional Area Management.
FAMIS Financial Accounting Management Information System.
FAMP Facilities Acquisition Management Plan.
FAMSIM Family of Simulations (USA term).
fan out The process of splitting a message to deliver e-mail messages to individual recipients. [Exchange 2007]
fan-beam antenna A directional antenna producing a main beam having a large ratio of major to minor dimension at any transverse cross section.
fan-out thread A thread that creates multiple message copies and places them in the appropriate link queues.
fanout cable Synonym breakout cable.
FAQ Frequently Asked Questions
FAQ file Abbreviation for Frequently Asked Questions file. An online file that contains frequently asked questions with answers provided to assist new users and…
FAR See Federal Acquisition Regulation.
Far Field The region far from an antenna compared to the dimensions of the antenna and the wavelength of the radiation.