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  • O'Neill Cylinder - An O'Neill cylinder is an orbiting space colony composed of two large cylinders that rotate in opposite directions to replicate the effects of Earth's gravity.
  • OA&M (operations, administration, and management) - OA&M (operations, administration, and management) is a general term used to describe the costs, tasks involved, or other aspects of operating, administering, and managing something such as a computer network.
  • OAB (offline address book) - An Offline Address Book is a downloaded copy of a Microsoft Outlook user's address list which allows the user access to email addresses when disconnected from Exchange Server.
  • OASIS (Organization for the Advancement of Structured Information Standards) - OASIS (Organization for the Advancement of Structured Information Standards) is a nonprofit, international consortium whose goal is to promote the adoption of product-independent standards for information formats such as Standard Generalized Markup Language (SGML), Extensible Markup Language (XML), and Hypertext Markup Language (HTML).
  • OASIS Cloud Application Management for Platforms (CAMP) - OASIS Cloud Application Management for Platforms (CAMP) is a specification intended to foster interoperability between cloud environments and to simplify the management of cloud applications.
  • OAuth - OAuth (Open Authorization) is an open standard authorization framework for token-based authorization on the internet.
  • obfuscation - Obfuscation means to make something difficult to understand.
  • object - In object-oriented programming (OOP), objects are the things you think about first in designing a program and they are also the units of code that are eventually derived from the process.
  • object code - Source code and object code refer to the "before" and "after" versions of a computer program that is compiled (see compiler) before it is ready to run in a computer.
  • object ID (OID) - An object identifier (OID) is an unambiguous, long-term name for any type of object or entity.
  • object recognition - Object recognition is at the convergence points of robotics, machine vision, neural networks and AI.
  • object storage - Object storage, also called object-based storage, is an approach to addressing and manipulating data storage as discrete units, called objects.
  • object storage device (OSD) - An object-based storage device or object storage device (OBSD or OSD) is a computer storage system that organizes data into containers called objects that a user or application determines are related.
  • object-oriented database management system (OODBMS) - An object-oriented database management system (OODBMS), sometimes shortened to ODBMS for object database management system, is a database management system (DBMS) that supports the modelling and creation of data as objects.
  • object-oriented programming (OOP) - Object-oriented programming (OOP) is a computer programming model that organizes software design around data, or objects, rather than functions and logic.
  • object-relational mapping (ORM) - Object-relational mapping (ORM) is a mechanism that makes it possible to address, access and manipulate objects without having to consider how those objects relate to their data sources.
  • obliquity - In systems engineering, obliquity is a theory that proposes the best way to achieve a goal when you are working with a complex system is to take an indirect approach instead of a direct one.
  • Occupational Safety and Health Administration (OSHA) - Occupational Safety and Health Administration (OSHA) is a federal organization (part of the Department of Labor) that ensures safe and healthy working conditions for Americans by enforcing standards and providing workplace safety training.
  • Ockham's razor (Occam's razor) - Ockham's razor (also spelled Occam's razor, pronounced AHK-uhmz RAY-zuhr) is the idea that, in trying to understand something, getting unnecessary information out of the way is the fastest way to the truth or to the best explanation.
  • OCR (optical character recognition) - OCR (optical character recognition) is the use of technology to distinguish printed or handwritten text characters inside digital images of physical documents, such as a scanned paper document.
  • OCSP (Online Certificate Status Protocol) - OCSP (Online Certificate Status Protocol) is one of two common schemes used to maintain the security of a server and other network resources.
  • octal latch - An octal latch is an integrated circuit (IC) that contains eight binary digital circuits called latches.
  • OCTAVE - OCTAVE (Operationally Critical Threat, Asset, and Vulnerability Evaluation) is a security framework for determining risk level and planning defenses against cyber assaults.
  • octet - In computers, an octet (from the Latin octo or "eight") is a sequence of eight bit s.
  • Oculus Rift - Oculus Rift is a VR headset that is designed to connect to a high-powered PC to enable advanced computations and graphics rendering.
  • OCX - An OCX is an Object Linking and Embedding (OLE) custom control, a special-purpose program that can be created for use by applications running on Microsoft's Windows systems.
  • ODCA (Open Data Center Alliance) - The Open Data Center Alliance (ODCA) is an independent information technology (IT) consortium whose goal is to develop a unified vision of cloud requirements.
  • ODM (original design manufacturer) - An ODM (original design manufacturer) is a company that takes the original specifications of another company or individual and builds the design to the product specifications.
  • ODX (Offloaded Data Transfer) - Offloaded Data Transfer (ODX) is a feature in Microsoft Windows Server 2012 that speeds up copy and move operations by allowing them to be performed by the storage hardware rather than the operating system.
  • OEM (original equipment manufacturer) - OEM, or original equipment manufacturer, is a broad term that describes a web of relationships among IT hardware vendors, hardware component makers, software vendors and channel partners such as resellers and distributors.
  • OF-Config (OpenFlow Configuration and Management Protocol) - The OpenFlow Management and Configuration Protocol (OF-Config) is a protocol developed under the Open Networking Foundation used to manage physical and virtual switches in an OpenFlow environment.
  • OFDMA (orthogonal frequency-division multiple access) - Orthogonal frequency-division multiple access (OFDMA) is a feature of Wi-Fi 6 (802.
  • off-hours communications - Off-hours communications are work-related emails, texts, phone calls, social media messaging and other communications that are transmitted when an employee is not officially working.
  • off-peak - Off-peak, in a call center context, describes a time period with fewer calls than are handled in a busy period.
  • off-site backup - Off-site backup is a method of backing up data to a remote server or to media that is transported off site.
  • offensive security - Offensive security is a proactive and antagonistic approach to protecting computer systems, networks and individuals from attacks.
  • Office for Civil Rights (OCR) - The Office for Civil Rights (OCR) is an organization within the U.
  • Office of Management and Budget (OMB) - The Office of Management and Budget (OMB) is the business division of the Executive Office of the President of the United States that administers the United States federal budget and oversees the performance of federal agencies.
  • Office of Personnel Management (OPM) - The Office of Personnel Management (OPM) is an independent agency of the United States government that is tasked with the oversight of civil service hirings.
  • offline - Offline is the condition of being capable of but currently not connected to a network of computers or other devices.
  • offset printing (offset lithography) - Offset printing, also called offset lithography, is a method of mass-production printing in which the images on metal plates are transferred (offset) to rubber blankets or rollers and then to the print media.
  • offshore outsourcing - Offshore outsourcing, a type of business process outsourcing (BPO), is the exporting of IT-related work from the United States and other developed countries to areas of the world where there is both political stability and lower labor costs or tax savings.
  • offshore software testing - Offshore software testing is a software development model where an organization outsources the software testing process to a service partner team located in a different country with a different time zone.
  • Ogg Vorbis - Vorbis is an open source patent-free audio compression format, developed as a replacement for proprietary digital audio encoding formats, such as MP3, VQF, and AAC.
  • ohm - The ohm is the standard unit of electrical resistance in the International System of Units (SI).
  • Ohm's Law - Ohm's Law is the mathematical relationship among electric current, resistance, and voltage.
  • ohnosecond - An ohnosecond is that very short moment in time during which you realize that you have pressed the wrong key and deleted hours, days, or weeks of work.
  • OK - OK (pronounced oh-KAY and occasionally spelled okay) is a short way to say "I agree.
  • OKRs (Objectives and Key Results) - OKRs (Objectives and Key Results) is a performance management framework designed to encourage companies to set, communicate and monitor broad organizational goals and results.
  • OLAP (online analytical processing) - OLAP (online analytical processing) is a computing method that enables users to easily and selectively extract and query data in order to analyze it from different points of view.
  • OLAP cube - An OLAP cube is a multidimensional database that is optimized for data warehouse and online analytical processing (OLAP) applications.
  • OLAP dashboard - The “OLAP” designation indicates that one or more of the graphs or reports (sometimes referred to as “panes,” in the dashboard) are based on an OLAP (Online Analytical Processing) data source.
  • OLED (light-emitting diode) - OLED (organic light-emitting diode) is a display technology, pioneered and patented by Kodak, based on the use of organic polymer material as the semiconductor material in light-emitting diodes (LEDs).
  • OLED TV - OLED TV is a television display technology based on the characteristics of organic light-emitting diodes (OLED).
  • oligopoly - An oligopoly is a small group of companies that dominate a given market.
  • OLPC (One Laptop Per Child) - The One Laptop Per Child project (OLPC) is an initiative aimed at providing inexpensive laptop computers to children in the developing world as a means of bridging the digital divide.
  • OLTP (online transaction processing) - OLTP (online transaction processing) is a class of software programs capable of supporting transaction-oriented applications.
  • omnichannel - Omnichannel -- also spelled omni-channel -- is a multichannel approach to sales that seeks to provide customers with a seamless shopping experience, whether they're shopping online from a desktop or mobile device, by telephone, or in a brick-and-mortar store.
  • omnidirectional antenna - An omnidirectional antenna is a wireless transmitting or receiving antenna that radiates or intercepts radio-frequency (RF) electromagnetic fields equally well in all horizontal directions in a flat, two-dimensional (2D) geometric plane.
  • omnidirectional treadmill (ODT) - An omnidirectional treadmill (ODT) is a mechanical or electronic machine that allows the user to travel in any direction.
  • on the fly - In relation to computer technology, "on the fly" describes activities that develop or occur dynamically rather than as the result of something that is statically predefined.
  • on-board diagnostics (OBD) - On board-diagnostics (OBD) is the inclusion of circuitry within a device that can indicate proper function and calibration of the main unit or specific fault states.
  • on-demand computing - On-demand (OD) computing is an increasingly popular enterprise model in which computing resources are made available to the user as needed.
  • on-screen display (OSD) - An on-screen display (OSD) is a control panel on a computer monitor or television screen that allows you to select viewing options and/or adjust components of the display, such as brightness, contrast, and horizontal and vertical positioning.
  • ONC (Office of the National Coordinator for Health Information Technology) - The Office of the National Coordinator for Health Information Technology, abbreviated ONC, is an entity within the U.
  • one throat to choke - One throat to choke is an expression used in business to describe the advantage of purchasing goods or integrated services from a single vendor.
  • one-socket server - A one-socket server is a server based around a single motherboard with a single CPU socket.
  • one-time pad - In cryptography, a one-time pad is a system in which a randomly generated private key is used only once to encrypt a message that is then decrypted by the receiver using a matching one-time pad and key.
  • one-time password (OTP) - A one-time password (OTP) is an automatically generated numeric or alphanumeric string of characters that authenticates the user for a single transaction or login session.
  • one-time password token (OTP token) - A one-time password token (OTP token) is a security hardware device or software program that is capable of producing a single-use password or PIN passcode.
  • OneID - OneID is a digital identity management service that provides a repository for usernames and passwords, eliminating the need for people to remember numerous arcane character sequences.
  • online - Online is the condition of being connected to a network of computers or other devices.
  • online customer community - Online customer communities are Web-based gathering places for customers, experts, and others to discuss problems, post reviews, brainstorm, and engage with one another.
  • online file sharing service - An online file sharing service provides a way to store and access documents, data, photos and video in the cloud rather than storing the information locally on a device hard drive or removable media.
  • online mapping - Online mapping is the compilation and publication of Web sites that provide exhaustive graphical and text information in the form of maps and databases.
  • online risk - Online risk is the vulnerability of an organization's internal resources that arises from the organization using the Internet to conduct business.
  • online service provider (OSP) - On the Internet, OSP (online service provider) has several different meanings.
  • ONNX - ONNX (Open Neural Network Exchange) is an open container format for the exchange of neural network models between different frameworks, providing they support ONNX import and export.
  • ONOS (Open Network Operating System) - ONOS (Open Network Operating System) is an operating system (OS) designed for network service providers to help build carrier-grade software-defined networks architected for high scalability, availability and performance.
  • onshore outsourcing (domestic outsourcing) - Onshore outsourcing, also known as domestic outsourcing, is the obtaining of services from someone outside a company but within the same country.
  • OODA loop - The OODA loop (Observe, Orient, Decide, Act) is a four-step approach to decision-making that focuses on filtering available information, putting it in context and quickly making the most appropriate decision while also understanding that changes can be made as more data becomes available.
  • OPAC (Online Public Access Catalog) - An OPAC (Online Public Access Catalog) is an online bibliography of a library collection that is available to the public.
  • open - In information technology, a product or system is described as open when its workings are exposed to the public and capable of being modified or improved by anyone.
  • open API (public API) - Review this definition to learn about open APIs, also known as a public APIs, including their associated benefits, industry use cases and unique attributes.
  • Open Compute Project - The Open Compute Project is an initiative started by Facebook to share efficient server and data center designs with the general IT industry.
  • Open Container Initiative - The Open Container Initiative, formerly known as the Open Container Project, is a Linux Foundation project designed to establish common open standards for container platforms.
  • open content - Open content is material, such as documents, audio or video presentations, that may be freely and legally edited, excerpted, reproduced and republished.
  • open core model (open core software) - The open core model is a business strategy where a company offers a “core” version of a product with limited features as free and open source (FOSS) software at the same time an add-on commercial version is released as proprietary software.
  • Open Data-Link Interface (ODI) - ODI (Open Data-Link Interface) is a software interface that allows different Data-Link Layer protocols to share the same driver or adapter in a computer.
  • Open Database Connectivity (ODBC) - Open Database Connectivity (ODBC) is an open standard application programming interface (API) for accessing a database.
  • Open Document Format (ODF) - The Open Document Format (ODF) is an XML-based open source file format for saving and exchanging text, spreadsheets, charts, and presentations.
  • Open Grid Services Architecture (OGSA) - The Open Grid Services Architecture (OGSA) is a set of standards defining the way in which information is shared among diverse components of large, heterogeneous grid systems.
  • Open Handset Alliance (OHA) - The Open Handset Alliance (OHA) is a coalition of more than 30 technology and mobile companies that introduced Android, an open source mobile phone operating system.
  • open loop / closed loop payment cards - Open loop and closed loop, in the context of payment cards, are categories that stipulate whether a card can be used in businesses other than that of the card issuer.
  • Open Multimedia Application Platform (OMAP) - Open Multimedia Application Platform (OMAP) is the name of Texas Instrument’s application processor.
  • Open Network Automation Platform - The Open Network Automation Platform (ONAP) is a networking project that provides a digital environment for the orchestration and automation of complex network services.
  • open networking - Open networking describes a network that uses open standards and commodity hardware.
  • Open Platform Communications (OPC) - Open Platform Communications (OPC) is an interoperability standard for the secure exchange of industrial automation data.
  • Open Plugable Specification (OPS) - Open Pluggable Specification (OPS) is a set of parameters for standardizing modules that add compute ability to screen readers.
  • open redirect - Open redirect is a security flaw in an app or a web page that causes it to fail to properly authenticate URLs.
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