One-to-oneA phrase used in the biometrics community to describe a system that compares one reference to one enrolled reference to make a decision.
one-way communicationCommunication in which information is always transferred in only one preassigned direction.
one-way encryption1. A method of encryption used where a requirement exists to prevent the decryption of the cipher text, given full information about the algorithm [CESG].
one-way function1. A transfer function f which is relatively easy to compute, but for which, for a general value, y , within the selected range, it is computationally…
One-Way Hash AlgorithmHash algorithms which map arbitrarily long inputs into a fixed-size output such that it is very difficult (computationally infeasible) to find two…
one-way messagingA method of transmitting messages without having to block until a response is received.
one-way regulatorA component which allows the transfer of information from one system to another, whilst providing a high level of confidence that information flow in the…
online computer systemA computer system that is a part of, or is embedded in, a larger entity, such as a communications system, and that interacts in real or near-real time…
online shoppingA process in which images or listings of goods and services are viewed remotely via electronic means, e.g.
online software upgradeIn computer networking, a software modification or installation performed remotely from an originating site (e.g.
onsite storageStorage of records on the premises of the organization See also offsite storage.
ONTAPOpen Network Technology for Appliance Products. Generally referred to as Data ONTAP.
OntologyAn ontology defines the common words and concepts (meanings) used to describe and represent an area of knowledge, and so standardizes the meanings.
oobe.xml fileA content file that can be used to store content to display in the customizable areas of Windows Welcome, Welcome Center, and the Get Connected Wizard.
OPCWOrganization for the Prohibition of Chemical Weapons.
OPECOrganization of Petroleum Exporting Countries. 210
Open AccessThe ability to send or wheel electric power to a customer over a transmission and distribution system that is not owned by the power generator (seller).
open circuitIn communications, a circuit available for use. 2. In electrical engineering, a circuit that contains an essentially infinite impedance.
Open Circuit Test LineThe term "Open Circuit Test Line" denotes an arrangement in an end office which provides an ac open circuit termination of a trunk or line by means of an…
Open Database Communication (ODBC)A standard API (application program interface) used to communicate with database management systems, developed by Microsoft, and incorporated in ArcView…
Open Directory ProjectA directory project run by thousands of volunteer editors. In principal, this is a very exciting and powerful way to organise the web.
open dual busA dual bus in which the head-of-bus functions for both buses are at different locations.
open firmware (OFW)The firmware or system startup code used in some NetApp appliances. Like the widely known BIOS, OFW is used to bring the hardware out of reset and perform…
Open Geodata Interoperability Specification (OGIS)The Open Geodata Interoperability Specification being developed by OGC to support interoperability of GIS systems in a heterogenous computing environment.
Open GIS Consortium (OGC)A group composed of software vendors, academics, government agencies, consultants and software integrators, dedicated to open systems geoprocessing.
OPEN LOOKA graphical user interface (GUI) for the X Window system developed by AT&T (Open Look) and Sun Microsystems (OPEN LOOK). (See also OSF/Motif).
open network architecture (ONA)In the context of the FCC's Computer Inquiry III, the overall design of a communication carrier's basic network facilities and services to permit all…
open proxyA proxy server that accepts connection requests from anyone anywhere and forwards the traffic as if it has originated from the local hosts. [Exchange 2007]
open recordany record that is open to public inspection.
Open RelayWhen the Internet was young, people trusted each other (or there simply weren't too many of them) and everybody was allowed to use everybody else's SMTP…
Open Software Foundation (OSF)The Open Software Foundation is an international consortium that promotes the standardization of the UNIX operating system.
Open SourceSoftware which is distributed with its source code such that developers can modify it as they see fit.
open source softwarePrograms for which the source code is freely available and freely redistributable, with no commercial strings attached.
open specificationsPublic specifications that are maintained by an open, public consensus process to accommodate new technologies over time and that are consistent with…
open standardscomputer operating standards that permit inter-communication and migration of data among different kinds of proprietary systems.
open storageStorage of classified information within an accredited facility, but not in General Services Administration approved secure containers, while the facility…
open switching interval (OSI)An interval when the dc voltage applied between the tip and ring conductors of a line is removed, hence temporarily suspending line supervision and…
open system1. A system with characteristics that comply with specified, publicly maintained, readily available standards and that therefore can be connected to other…
open system application program interfaceA combination of standards-based interfaces specifying a complete interface between an application program and the underlying application platform [POSIX.
open system environment (OSE)The comprehensive set of interfaces, services, and supporting formats, plus user aspects for interoperability or portability of applications, data, or…
open systemsAn environment that allows interchangeability and integrated operation between software systems from different vendors.
open systems architectureThe layered hierarchical structure, configuration, or model of a communications or distributed data processing system that (a) enables system description…
Open Systems Interconnect (OSI)a seven-layer hierarchical reference interface and communications model sponsored by ISO, 1984, known as the OSI Reference Model: layer 7--applications…
Open Systems Interconnection (OSI)Pertaining to the logical structure for communications networks standardized by the International Organization for Standardization (ISO).
open video systemsAn alternative method to provide cable-like video service to subscribers.
open waveguideAn all-dielectric waveguide in which electromagnetic waves are guided by a refractive index gradient so that the waves are confined to the guide by…
open wireConductors that are separately supported with insulators on poles or towers above the surface of the Earth.
Open World Assumptionpresumption stating that everything we donât know is undefined.
open-security environmentIn INFOSEC, an environment in which protection of data and resources from accidental or malicious acts is achieved through normal operational procedures.
Open-set IdentificationBiometric task that more closely follows operational biometric system conditions to 1) determine if someone is in a database and 2) find the record of the…
open-shelf filingA system wherein files are placed on shelves without any doors or drawers. Side- or end-tab file folder labels and guides are used to locate the file…
OpenLDAPhttp://www.openldap.org Open Source Lightweight Directory Access Protocol in the C Language. h
OpenSSLSSL implementation used by GSI. Stands for Open Source Secure Sockets Layer. Distribution in the C Language. For more information, see http://www.openssl.
OperaA fast standards based web browser. See also: Opera.com
operandAn operand is an argument of an operator. Expressions involve combinations of operators and operands.
Operate CommandsCommands and data distributed throughout the SDS to operate the system.
Operating BudgetAn operating budget is the annual budget of an activity stated in terms of Budget Classification Code, functional/sub-functional categories, and cost…
Operating CostsThose program costs necessary to operate and maintain the capability. These costs include Military Personnel, and Operations and Maintenance.
operating procedureA set of rules defining the correct use of a Target of Evaluation [ITSEC].
operating systemSoftware which directs the overall activity of a computer (e.g. MS-DOS , Windows , Linux , etcetera).
Operating System (OS)The software that the rest of the software depends on to make the computer functional. On most PCs this is Windows or the Macintosh OS.
operating system partitioninga feature of a standard operating system wherein isolated instances of the same host OS are created to eliminate application-level conflicts and…
operating system virtualizationUnlike hardware virtualization and para-virtualization, the virtualization of Operating Systems only permits the creation of several virtual instances of…
operating system volumeA volume that contains an operating system (for example, Windows Vista) that can be loaded by Windows Boot Manager.
Operating system-level virtualizationIn this case the virtualization layer sits between the operating system and the application programs that run on the operating system.
operating timeThe time interval between the instant of occurrence of a specified input condition to a system and the instant of completion of a specified operation. 2.
OperationThe manner in which a window unit opens, closes, locks, or functions; e.g., casement, double-hung, etc.
Operation and Organizational Plan (O&O Plan)Describes how an Army system will be integrated into the force structure, deployed, operated and supported in peacetime and wartime.