Technology terms starting with O

644 terms

optical fiber, conductive, riser See OFCR.
optical fiber, nonconductive See OFN.
optical fiber, nonconductive, plenum See OFNP.
optical fiber, nonconductive, riser See OFNR.
optical filter In the optical regime, an element that selectively transmits or blocks a range of wavelengths, polarizations, etc., or selectively displaces a beam, e.g.
optical heterodyning See optical mixing.
optical interconnection In an integrated circuit or electronic module, the use of opto-electronic devices to make or facilitate connections, in lieu of a direct connection…
optical interface In a fiber optic communications link, a point at which an optical signal is passed from one equipment or medium to another without conversion to an…
optical isolator A device that uses a short optical transmission path to accomplish electrical isolation between elements of a circuit.
optical junction Any physical interface in a fiber optic system. Note: Source to fiber, fiber to fiber, fiber to detector, beam to prism (or lens), fiber to lens, lens to…
optical line code Sequences of optical pulses suitably structured to permit information transfer over an optical link.
optical line pair 1. In optical measurements or specifications, a pair of usually straight contiguous stripes of equal width and having a defined degree of contrast, and…
optical link An optical transmission channel, including any repeaters or regenerative repeaters, designed to connect two electronic or opto-electronic communications…
optical mixing Optical beating, i.e., the mixing, i.e., heterodyning, of two lightwaves (incoming signal and local oscillator) in a nonlinear device to produce a beat…
optical modulator Any device used to modify any characteristic of an optical signal (lightwave) for the purpose of conveying information.
optical multiplexing See wavelength-division multiplexing.
optical network unit (ONU) A network element that is part of a fiber-in-the-loop system interfacing the customer analog access cables and the fiber facilities. [T1.508-1998]
optical path length In a medium of constant refractive index, n, the product of the geometric distance and the refractive index. 2.
optical path power penalty The extra optical power required to account for degradations due to reflections, intersymbol interference, and mode partition noise. [T1.646-1995]
optical power See radiant power.
optical power budget In a fiber-optic communication link, the allocation of available optical power (launched into a given fiber by a given source) among various…
optical power margin In an optical communications link, the difference between (a) the optical power that is launched by a given transmitter into the fiber, less transmission…
Optical Processing A type of analog processing, in which the behavior of light beams, passed through optical systems, is used in problem solving.
optical receiver A device that detects an optical signal, converts it to an electrical signal, and processes the electrical signal as required for further use.
optical regenerator See optical repeater.
optical repeater In an optical communication system, an optoelectronic device or module that receives an optical signal, amplifies it (or, in the case of a digital signal…
optical return loss (ORL) The ratio (in dB) of optical power arriving at the interface (P1) to the optical power reflected back from the same interface (P2). [T1.106-1988]
optical scanner An input device that scans paper or another medium to a digital image (e.g., TIFF and EPS) that can be stored, displayed, and manipulated on a computer
optical section The part of the physical plant consisting of the fiber-optic cabling and connectors interconnected to provide the transport function between two adjacent…
optical source In optical communications, a device that converts an electrical signal into an optical signal.
optical spectrum By custom and practice, the electromagnetic spectrum between the wavelengths of the vacuum ultraviolet at 0.001 m and the far infrared at 100 m.
optical splitter See directional coupler.
optical switch A switch that enables signals in optical fibers or integrated optical circuits (IOCs) to be selectively switched from one circuit to another.
optical system power margin See power margin.
optical thickness The product of the physical thickness of an isotropic optical element and its refractive index. 2.
optical time domain reflectometer (OTDR) An opto-electronic instrument used to characterize an optical fiber. Note 1: An OTDR injects a series of optical pulses into the fiber under test.
optical transmittance See transmittance.
optical transmitter A device that accepts an electrical signal as its input, processes this signal, and uses it to modulate an opto-electronic device, such as an LED or an…
optical waveguide Any structure having the ability to guide optical energy. Note: Optical waveguides may be (a) thin-film deposits used in integrated optical circuits…
optically active material A material that rotates the plane of polarization of light that passes through it.
Optimization Changes made to a web page to improve the positioning of that page with one or more search engines.
Optimized Disk Utilization Allows the full available capacity to be used on all drives attached to a controller, even if the drive sizes are different.
optimum traffic frequency Synonym FOT.
optimum transmission frequency Synonym FOT.
optimum working frequency Synonym FOT.
optional package An optional package is a set of Java ME APIs providing services in a specific area, such as database access or multimedia.
optional packages The set or sets of APIs in a Java platform edition which are available with and may be supported in a compatible implementation.
Optional Topography A Personal Identity Verification (PIV) card having both the Standard Topography (Mandatory Topography) features and the Optional features as defined in…
options Contracts which give the holder the right to buy (call options) or sell (put option) a fixed amount of a certain stock at a specified price within a…
opto-electronic Pertaining to any device that functions as an electrical-to-optical or optical-to-electrical transducer, or an instrument that uses such a device in its…
optoelectronic See opto-electronic.
optoisolator Synonym optical isolator.
OPX Abbreviation for off-premises extension.
OR (1) Operations Research. (2) Operational Requirement (Navy). (3) Operational Readiness. (4) Operational Reliability.
OR/SA (ORSA) Operations Research/Systems Analysis.
ORACL Overtone Research Advanced Chemical Laser.
ORACL HYLTE Overtone Research Advanced Chemical Laser Hypersonic Low Temperature. 214
ORACLE A relational database management system to which ARC/INFO has access through the DATABASE INTEGRATOR.
ORACLE HYLTE Overtone Research Advanced Chemical Laser Hypersonic Low Temperature.
oral history A method of gathering and preserving historical information through recorded interviews with participants in past events and ways of life
orange book Nickname name for the United States Department of Defense "Trusted Computer System Evaluation Criteria", DOD 5200.28-STD [CESG]. Also known as "TCSEC"
ORB An often translucent, circular anomaly (or “ball of light”) seen in photography -- and sometimes with the naked eye -- that may be, depending on your…
orbit The path, relative to a specified frame of reference, described by the center of mass of a satellite or other object in space subjected primarily to…
orbit determination The process of describing the past, present, or predicted position of a satellite in terms of orbital parameters. [JP 1-02]
Orbital Elements Any set of several parameters (e.g., semi-major axis, eccentricity, inclination, etc.) used to specify the position and motion of a satellite.
Orbital Maneuvering Vehicle (OMV) NASA program to provide capability to perform satellite on-orbit servicing. Operates from shuttle and Space Station.
Orbital Suborbital Program (OSP) A strategic target booster system used by the GMD Program that uses the Minuteman II booster stack.
Orbiting Debris Term referring to all earth-orbiting objects except active satellites.
ORC Operational Readiness Condition.
ORCA Operational Requirements Continuity Assessment.
ORD See Operational Requirements Document.
ORDALT Ordnance Alteration.
Order of Battle The identification, strength, command structure, and disposition of the personnel, units, and equipment of any military force.
order of diversity The number of independently fading propagation paths or frequencies, or both, used in diversity reception.
Order Wire Message A communications support function for internal control of communications elements.
orderwire circuit A voice or data circuit used by technical control and maintenance personnel for coordination and control actions relative to activation, deactivation…
orderwire multiplex A multiplex carrier set specifically designed for the purpose of carrying orderwire traffic, as opposed to one designed for carrying mission traffic.
ordinary ray See birefringence.
Organic Derived from living organisms.
Organic Search Results Most major search engines have results that consist of paid ads and unpaid listings.
organization A collection of Exchange computers grouped into sites. [Exchange 5.5]
organization claim A claim in intermediate or normalized form within an organization's namespace.
Organizational Forms Library A system folder on an Exchange computer that stores forms commonly accessed by users within an organization.
Organizational Unit Administration Boundary, container designed as object repositories. OU contains AD objects and their properties, and data, provide groupings that can be…
Organizational unit (OU) A container object that is an Active Directory administrative partition. OUs can contain users, groups, resources, and other OUs.
Organizer Any person who discovers, creates, investigates, or initiates the tax shelter investment, devises the business or financial plans for the investment or…
origin The reference location for a planar coordinate system, usually represented by the values 0,0. The place where a trip starts.
original order The arrangement of records established by the creator, preserved by NARA in order to preserve existing relationships, evidential significance, and the…
original record A primary or first-generation record or one that is designated as the official record
originating agency the same as creating agency (q.v.).
originating connection The connection between the termination of a user-network interface and an operator service access point that is used for communication between the user…
originating department See office of origin.
originating endpoint In a wideband packet node, the point that receives channelized traffic, packetizes it, and sends it into the wideband packet network. [T1.509-1995]
originating line information (OLI) Information indicating a toll class of service for the call. [T1.667-1999]
originating line-side access The ability to dial the appropriate 7- or 10-digit test number from a subscriber line. [T1.207-2000]
originating point code (OPC) A part of the routing label in a signaling message that uniquely identifies the originating point of that signaling message in a signaling network. [T1.
originating trunk-side access The ability to dial the appropriate test line number with trunk access using the appropriate test equipment. [T1.207-2000]
originating user The user that initiates a particular information transfer transaction. Note: The originating user may be either the source user or the destination user.
origination network The signaling network that initiates a non-circuit-related message containing intermediate signaling network indication (ISNI) information; this network…
originator The acronym for the agency that is the original source of the data. The source for nearly all map layers created by OCTO that are not part of the…