Browse Definitions by Alphabet

resistor - A resistor is an electrical component that limits or regulates the flow of electrical current in an electronic circuit.
reskilling - Reskilling is the process of teaching an employee new skills to improve proficiency in their current job or move into an advanced position.
resolution - Resolution is the number of pixels -- picture elements or individual points of color -- that can be contained on a display screen or in a camera sensor.
resource allocation - Resource allocation is the process of assigning and managing assets in a manner that supports an organization's strategic planning goals.
resource contention - In computing, 'resource contention' refers to a conflict over a shared resource between several components.
Resource Description Framework (RDF) - The Resource Description Framework (RDF) is a general framework for representing interconnected data on the web.
RESTful API - A RESTful API is an architectural style for an application programming interface that uses HTTP requests to access and use data.
restore point - A system restore point is a backup copy of important Windows operating system (OS) files and settings that can be used to recover the system to an earlier point of time in the event of system failure or instability.
Resultant Set of Policy (RSoP) - Resultant Set of Policy (RSoP) refers to all the group policies applied to a user and computer.
Results-Only Work Environment (ROWE) - A Results-Only Work Environment (ROWE) is one in which the most important criteria for evaluating employee performance is the completion of satisfactory work on time.
retina scan - Retina scanning is a biometric authentication technology that uses an image of an individual's retinal blood vessel pattern as a unique identifying trait for access to secure installations.
Retrieval-Augmented Language Model pre-training - A Retrieval-Augmented Language Model, also referred to as REALM or RALM, is an artificial intelligence language model designed to retrieve text and then use it to perform question-based tasks.
return merchandise authorization (RMA) - An RMA (return merchandise authorization) is a numbered authorization provided by a mail-order or e-commerce merchant to permit the return of a product.
revenue cycle management (RCM) - Revenue cycle management (RCM) is the financial process, utilizing medical billing software, that healthcare facilities use to track patient care episodes from registration and appointment scheduling to the final payment of a balance to ensure proper identification, collection and management of revenues from patient services.
revenue operations (RevOps) - Revenue operations (RevOps) is the strategic integration of sales, marketing and service departments to provide a better end-to-end view to administration and management, while leaving day-to-day processes within the departments.
Reverse Address Resolution Protocol (RARP) - Reverse Address Resolution Protocol (RARP) is a protocol a physical machine in a local area network (LAN) can use to request its IP address.
reverse brute-force attack - A reverse brute-force attack is a type of brute-force attack in which an attacker uses a common password against multiple usernames in an attempt to gain access to a network.
reverse logistics - Reverse logistics is the set of activities that is conducted after the sale of a product to recapture value and end the product's lifecycle.
reverse-engineering - Reverse-engineering is the act of dismantling an object to see how it works.
RFC 1918 - Request for Comment 1918 (RFC 1918), “Address Allocation for Private Internets,” is the Internet Engineering Task Force (IETF) memorandum on methods of assigning of private IP addresses on TCP/IP networks.
RFID (radio frequency identification) - RFID (radio frequency identification) is a form of wireless communication that incorporates the use of electromagnetic or electrostatic coupling in the radio frequency portion of the electromagnetic spectrum to uniquely identify an object, animal or person.
RFID tagging - RFID tagging uses small radio frequency identification devices to track and identify objects.
RFM analysis (recency, frequency, monetary) - RFM analysis is a marketing technique used to quantitatively rank and group customers based on the recency, frequency and monetary total of their recent transactions to identify the best customers and perform targeted marketing campaigns.
RFx - RFx (request for x) encompasses the entire formal request process and can include request for bid (RFB), request for information (RFI), request for proposal (RFP), request for quotation (RFQ) and request for tender (RFT).
RGB (red, green and blue) - RGB (red, green and blue) refers to a system representing the colors used on a digital display screen.
RHIA (Registered Health Information Administrator) - An RHIA, or registered health information administrator, is a certified professional who oversees the creation and use of patient health information, including analyzing that data.
Rich Internet Application (RIA) - A rich Internet application (RIA) is a Web application designed to deliver the same features and functions normally associated with deskop applications.
Rich Text Format (RTF) - Rich Text Format (RTF) is a file format that lets you exchange text files between different word processors in different operating systems.
RickRoll - On the Internet, a RickRoll is a prank where a visitor who clicks on a specific link is intentionally misdirected to a video of pop star Rick Astley's hit "Never Gonna Give You Up.
Rijndael - Rijndael (pronounced rain-dahl) is an Advanced Encryption Standard (AES) algorithm.
risk analysis - Risk analysis is the process of identifying and analyzing potential issues that could negatively impact key business initiatives or projects.
risk assessment - Risk assessment is the process of identifying hazards that could negatively affect an organization's ability to conduct business.
risk assessment framework (RAF) - A risk assessment framework (RAF) is a strategy for prioritizing and sharing information about the security risks to an information technology (IT) infrastructure.
risk avoidance - Risk avoidance is the elimination of hazards, activities and exposures that can negatively affect an organization and its assets.
Risk Management Framework (RMF) - The Risk Management Framework (RMF) is a template and guideline used by companies to identify, eliminate and minimize risks.
risk management specialist - A risk management specialist is a role appointed within organizations to identify potential risks that might negatively affect the business.
risk-based authentication (RBA) - Risk-based authentication (RBA) is an authentication method in which varying levels of stringency are applied to a system’s authentication process based on the likelihood that access to that system could result in its compromise.
risk-based patch management (RBPM) - Risk-based patch management (RBPM) is an approach to implementing patches to fix software code that prioritizes patches that address security issues posing the highest risk to the organization.
risk-based vulnerability management (RBVM) - Risk-based vulnerability management (RBVM) is an approach to identifying and addressing security vulnerabilities in an organization's IT environment that prioritizes remediating vulnerabilities that pose the greatest risk.
RMM software (remote monitoring and management software) - RMM software (remote monitoring and management software) is a type of application that information technology (IT) service providers and departments use to maintain their clients' and business organizations' IT assets, infrastructure and systems.
RMON (Remote Network Monitoring) - RMON (Remote Network Monitoring) provides standard information that a network administrator can use to monitor, analyze, and troubleshoot a group of distributed local area networks (LANs) and interconnecting T-1/E-1 and T-2/E-3 lines from a central site.
robocall - Robocalls are automated telephone calls that deliver a recorded message.
robot - A robot is a machine designed to execute one or more tasks automatically with speed and precision.
robot economy - The robot economy is a scenario in which most of the labor required to sustain human life is automated.
robotic process automation (RPA) - Robotic process automation (RPA) is a technology that mimics the way humans interact with software to perform high-volume, repeatable tasks.
robotic surgery (robot-assisted surgery) - Robotic surgery is the use of computer technologies working in conjunction with robot systems to perform medical procedures.
role mining - Role mining is the process of analyzing user-to-resource mapping data to determine or modify user permissions for role-based access control (RBAC) in an enterprise.
role-playing game (RPG) - A role-playing game (RPG) is a game in which each participant assumes the role of a character that can interact within the game's imaginary world.
rolling deployment - A rolling deployment is the installation of software updates on one server or server subset at a time, rather than updating all servers or server subsets at the same time.
room-scale virtual reality (VR) - Room-scale (or roomscale) virtual reality (VR) is the use of clear space to allow movement for someone using a VR application such as a VR game.
round robin - A round robin is an arrangement of choosing all elements in a group equally in some rational order, usually from the top to the bottom of a list and then starting again at the top of the list and so on.
rounding error - Rounding error is the difference between a rounded-off numerical value and the actual value.
route summarization (route aggregation) - Route summarization -- also known as route aggregation -- is a method to minimize the number of routing tables in an Internet Protocol (IP) network.
routing table - A routing table is a set of rules, often viewed in table format, that's used to determine where data packets traveling over an Internet Protocol (IP) network will be directed.
RPC over HTTP - Remote Procedure Call over HTTP (RPC over HTTP) is a Microsoft protocol that enables Microsoft Outlook clients to access Microsoft Exchange servers over HTTP.
RRAM or ReRAM (resistive random access memory) - RRAM, also known as resistive random access memory or ReRAM, is a form of non-volatile storage that operates by changing the resistance of a specially formulated solid dielectric material.
RS Means - RS Means is a division of Reed Business Information that provides cost information to the construction industry so contractors in the industry can provide accurate estimates and projections for their project costs.
RS-232C - RS-232C is one of the earlier versions of the long-established standard RS-232, which defines a physical interface for relatively low-speed serial data communication between computers and related devices.
RSAT (Remote Server Administration Tools) - RSAT (Remote Server Administration Tools) refers to a set of tools from Microsoft that enable IT administrators to remotely manage roles and features in Windows Server from a computer that is running Windows 11, Windows 10 or Windows 7 Service Pack 1.
Ruby - Ruby is an open source, interpreted, object-oriented programming language created by Yukihiro Matsumoto, who chose the gemstone's name to suggest "a jewel of a language.
Ruby on Rails (RoR or Rails) - Ruby on Rails is an open-source framework for database-backed web development in Ruby, an object-oriented programming language similar to Perl and Python.
rule of five (statistics) - The rule of five is a rule of thumb in statistics that estimates the median of a population by choosing a random sample of five from that population.
runbook - Runbooks are a set of standardized written procedures for completing repetitive IT processes within a company.
runlevel - A runlevel is an operating state on a Unix and Unix-based operating system that is preset on the Linux-based system.
runtime - Runtime is a piece of code that implements portions of a programming language's execution model.
What is a reactive systems architecture? - A computer systems paradigm that takes advantage of the responsiveness, flexibility and resiliency of reactive programming, so that various components can take continue to function and even thrive if any component is compromised.
What is a real-time operating system (RTOS)? - A real-time operating system (RTOS) is an OS that guarantees real-time applications a certain capability within a specified deadline.
What is a reasoning engine? - A reasoning engine is an iterative software system that mimics human problem-solving capabilities, making inferences or reaching conclusions based on rules, logic and established facts or data.
What is a recommendation engine? - A recommendation engine is a system that gives customers recommendations based on their behavior patterns and similarities to people who might have shared preferences.
What is a records retention schedule? - A records retention schedule is a policy that defines how long paper and electronic content must be kept and provides disposal guidelines for how those items should be discarded.
What is a registration authority (RA)? - A registration authority (RA) is an entity that is authorized to verify user requests for a digital certificate and also to tell a certificate authority (CA) to issue that certificate to the user.
What is a remote desktop and how does it work? - A remote desktop is a program or an operating system feature that allows a user to connect to a computer in another location, see that computer's desktop and interact with it as if it were local.
What is a Request for Comments (RFC)? - A Request for Comments (RFC) is a formal document created by the Internet Engineering Task Force (IETF) that outlines technical specifications, organizational notes and standards relevant to internet and networking technologies, including protocols such as routing, addressing and transport technologies.
What is a request for proposal (RFP)? - A request for proposal (RFP) is a document an organization uses when it's searching for a product or service to meet specific requirements.
What is a restricted API? - A restricted API is an application program interface whose access, or use, is intentionally limited by web site developers for security purposes or business reasons.
What is a risk map (risk heat map)? - A risk map, or risk heat map, is a data visualization tool for communicating specific risks an organization faces.
What is a risk profile? Definition, examples and types - A risk profile is a quantitative analysis of the types of threats an organization, asset, project or individual faces.
What is a robo-advisor? Everything to know before using one - A robo-advisor is a virtual financial advisor powered by artificial intelligence (AI) that employs an algorithm to deliver an automated selection of financial advisory services.
What is a rootkit? - A rootkit is a program or a collection of malicious software tools that give a threat actor remote access to and control over a computer or other system.
What is a router? - A router is a physical or virtual appliance that passes information between two or more packet-switched computer networks.
What is AMD Ryzen? - AMD Ryzen is the brand name for Advanced Micro Devices' line of desktop and mobile processors.
What is RAID (redundant array of independent disks)? - RAID (redundant array of independent disks) is a way of storing the same data in different places on multiple hard disks or solid-state drives (SSDs) to protect data in the case of a drive failure.
What is RAID 0 (disk striping)? - RAID 0 (disk striping) is the process of dividing a body of data into blocks and spreading the data blocks across multiple storage devices, such as hard disk drives (HDDs) or solid-state drives (SSDs), in a redundant array of independent disks group.
What is RAID 5? - RAID 5 is a redundant array of independent disks configuration that uses disk striping with parity.
What is ransomware? Definition and complete guide - Ransomware is malware that locks and encrypts a victim's data, files, devices or systems, rendering them inaccessible and unusable until the attacker receives a ransom payment.
What is RCS messaging (RCS chat)? Explaining how to use it - RCS, or Rich Communication Services, is a messaging protocol used in mobile devices.
What is React Native? - React Native is an open source JavaScript framework for mobile application development.
What is read-only memory (ROM)? - Read-only memory, or ROM, is a type of computer storage containing non-volatile, permanent data that normally can only be read, not written to.
What is real user monitoring (RUM)? - Real user monitoring (RUM) is a type of performance monitoring that records user interactions with a website or application.
What is real-time business intelligence (RTBI)? - Real-time business intelligence (RTBI) combines data analytics and various data processing tools to enable access to the most relevant, up-to-the-minute data and visualizations.
What is Real-Time Transport Control Protocol (RTCP)? - Real-Time Transport Control Protocol (RTCP) is a network communication protocol that works alongside Real-Time Protocol (RTP) to monitor and track data delivery on large multicast networks via RTP's associated transmission metrics.
What is records management? - Records management is the supervision and administration of digital or paper records, regardless of format.
What is red teaming? - Red teaming is the practice of rigorously challenging plans, policies, systems and assumptions with an adversarial approach.
What is Reddit? How it works, history and pros and cons - Reddit is a social media platform and forum-style website where content is socially curated and promoted by site members through voting.
What is regression testing? - Regression testing is a type of software test that assesses if changes to an application, or other related software components, introduce defects.
What is reinforcement learning from human feedback (RLHF)? - Reinforcement learning from human feedback (RLHF) is a machine learning (ML) approach that combines reinforcement learning techniques, such as rewards and comparisons, with human guidance to train an artificial intelligence (AI) agent.
What is reinforcement learning? - Reinforcement learning (RL) is a machine learning training method that trains software to make certain desired actions.
What is relationship marketing? - Relationship marketing is a facet of customer relationship management (CRM) that focuses on customer loyalty and long-term customer engagement rather than shorter-term goals like customer acquisition and individual sales.
What is reliability, availability and serviceability (RAS)? - Reliability, availability and serviceability (RAS) are related operational activities that must be considered when designing, manufacturing, purchasing and using a computer product or component.
What is remote desktop protocol (RDP)? - Remote desktop protocol (RDP) is a secure network communications protocol developed by Microsoft.