IT Glossary
Key Terms To Know In The IT Industry
Quick Boot
A feature that allows a computer or device to start up faster than traditional boot processes by saving the system state or using optimized initialization procedures.
You will find this term commonly used in Operating Systems
Quick Charge
A technology developed to allow devices to charge faster than conventional charging methods. It's widely used in smartphones and other portable electronics to reduce charging time.
You will find this term commonly used in Hardware/Consumer Electronics
Quick Edit Mode in Command Line Interfaces
A feature in some command line interfaces (CLI) that allows users to easily select, copy, and paste text directly within the CLI window, enhancing usability and efficiency when interacting with the command line.
You will find this term commonly used in Software Development
Quick Fix Engineering (QFE)
A term used by Microsoft to describe a small update to software that addresses a specific issue. QFEs are typically made available to resolve specific problems before a broader update is released.
You will find this term commonly used in Software Development
Quick Response (QR) Codes in IT
Two-dimensional barcodes that store information accessible by scanning with a smartphone or other device, used in various IT applications for quick access to websites, authentication, and information dissemination.
You will find this term commonly used in General IT
Quick Response Code (QR Code)
A more detailed entry for QR Code emphasizing its encoding of information in a visual format that can be scanned from a display or printed material, facilitating actions like website visits, payments, or information retrieval.
You will find this term commonly used in General IT
Quick Response Manufacturing (QRM)
A companywide strategy aimed at reducing lead times in all phases of manufacturing and office operations. It emphasizes the rapid response to customer demands and can significantly reduce costs and increase efficiency in IT hardware production.
You will find this term commonly used in Operations Management
Quick UDP Internet Connections (QUIC)
A transport layer network protocol developed initially by Google. QUIC aims to provide reduced latency and improved security over traditional protocols such as TCP and UDP. It is designed for use over multiplexed connections and supports a streamlined approach to connection setup.
You will find this term commonly used in Networking
QuickPath Interconnect (QPI)
A communication protocol that allows the transfer of data between processors and other components within a computer. It was developed by Intel to create a faster interconnect between components in high-performance computing systems.
You will find this term commonly used in Computer Architecture
Quicksand Attack
A type of cyber attack that targets sandboxes (security mechanisms for separating running programs), attempting to escape the sandbox to access the underlying system or network.
You will find this term commonly used in Cybersecurity
Quicksilver (Software)
A macOS application that allows users to use the keyboard to locate and launch apps, files, and other resources, enhancing productivity by reducing reliance on mouse navigation.
You will find this term commonly used in Software/Application
QuickSort
A highly efficient sorting algorithm that, on average, makes O(n log n) comparisons to sort n items. It works by selecting a 'pivot' element from the array and partitioning the other elements into two groups based on the pivot.
You will find this term commonly used in Algorithms/Software
Quicksort Algorithm Complexity
The analysis of the computational complexity of the Quicksort algorithm, which, on average, has O(n log n) time complexity for sorting n elements but can degrade to O(n^2) in the worst-case scenario, depending on the choice of pivot.
You will find this term commonly used in Algorithms
QuickTime
A multimedia framework capable of handling various formats of digital video, media clips, sound, text, and a range of interactive panoramic images. It is developed by Apple Inc.
You will find this term commonly used in Multimedia
QuickTime VR
An image file format developed by Apple Inc. that allows the creation and viewing of photorealistic 360-degree virtual reality environments. Though less common today, it was an early step towards immersive multimedia content.
You will find this term commonly used in Multimedia
Quiesce
A state in which a computer, database, or application is put into a temporarily paused or inactive state to perform maintenance, backup, or apply updates safely without affecting active processes or risking data corruption.
You will find this term commonly used in Systems Management
Quiesce Point
A state in transaction processing where a system temporarily halts operations to reach a consistent state, often for purposes of backup, recovery, or applying system changes. This ensures data integrity during critical maintenance activities.
You will find this term commonly used in Database Management
Quiescent Consistency
A consistency model in distributed computing where a system is considered consistent if it is quiescent (i.e., no operations are taking place). It's a less strict form of consistency useful in certain types of distributed systems.
You will find this term commonly used in Distributed Systems
Quiescent State
A state of minimal activity or dormancy in a system, where operations are temporarily halted to achieve consistency, perform maintenance, or for safe reconfiguration. In distributed systems, reaching a quiescent state can be crucial for synchronization and consistency.
You will find this term commonly used in Distributed Systems
Quiescing Database
Temporarily pausing or suspending database activity to perform maintenance tasks such as backups or updates, ensuring that these tasks can be completed without the interference of ongoing transactions or changes.
You will find this term commonly used in Databases
Quiet Mode
A setting available in many software applications and operating systems that suppresses notifications, alerts, and other interruptions, typically to allow users to focus on tasks without distraction.
You will find this term commonly used in User Experience
Quiet Period
In networking, a quiet period is a designated time frame during which network activity is either reduced or halted to allow for maintenance, backups, or to ensure that critical operations can proceed without interference from routine traffic.
You will find this term commonly used in Networking
Quiet Time Policy
Policies set in IT environments to define periods during which notifications, updates, or backups are minimized or suspended to avoid disrupting users. This can be particularly important in 24/7 operations or when minimizing interruptions is critical.
You will find this term commonly used in IT Management
Quine (Program)
A computer program which takes no input and produces a copy of its own source code as its only output. Quines are considered a form of self-replicating program and are used in computer science to study recursion and the theory of computation.
You will find this term commonly used in Programming Theory
Quintillion Instructions Per Second (QUIPS)
A measure of a computer's processing power. Quintillion instructions per second (1 QUIPS = 10^18 instructions per second) indicate the ability of a computer to process quintillions of instructions each second.
You will find this term commonly used in Computing Performance
Quirks Mode
A mode in web browsers for the sake of maintaining backward compatibility with web pages designed for older browsers. It allows the browser to emulate a non-standard behavior in interpreting web pages.
You will find this term commonly used in Web Development
Quorum
In distributed computing, a quorum is the minimum number of members of a group or component that must be present to make the operations of that group valid, often used in the context of fault tolerance and consensus protocols.
You will find this term commonly used in Distributed Systems
Quorum Consensus in Blockchain
A consensus mechanism used in blockchain networks where a transaction is considered valid and can be added to the block only if it gets approval from a majority (quorum) of nodes, ensuring security and reliability in decentralized systems.
You will find this term commonly used in Blockchain/Cryptocurrency
Quorum Voting
A method used in distributed systems to achieve consensus or agreement among distributed processes or nodes, ensuring that a majority (or a specified subset) agrees on a given action before it is executed, thus maintaining consistency and reliability.
You will find this term commonly used in Distributed Systems
Quorum-based Replication
A method used in distributed computing and databases to ensure consistency among replicated data. A write or update operation is considered successful only if a specified minimum number of replicas, or a quorum, acknowledge the operation.
You will find this term commonly used in Distributed Systems
Quota
A limit set on the amount of resources that can be used by a system, user, or application. In IT, quotas are often applied to disk usage, memory usage, and CPU time.
You will find this term commonly used in Systems Management
Quota Allocation
The process of distributing or assigning limits on resources such as disk space, CPU usage, or network bandwidth among users or applications. This is done to ensure fair use and prevent any single user or application from monopolizing resources.
You will find this term commonly used in Systems Administration
Quota Enforcement
The act of implementing and maintaining limits (quotas) on resources such as disk space, number of transactions, or data transfer. This ensures that no single user or process can consume excessive resources to the detriment of others.
You will find this term commonly used in Systems Management
Quota Exceeded Error
An error that occurs when a user or process tries to use more of a particular resource (such as disk space or CPU time) than is allowed under their quota, common in multi-user computer systems and cloud storage services.
You will find this term commonly used in Systems Management
Quota Management
The practice of controlling the amount of disk space, bandwidth, or resources an individual user or application can consume, often used in shared environments like cloud services or corporate networks to ensure fair usage.
You will find this term commonly used in Cloud Computing
Quota Management Software
Software tools that enable the enforcement of usage quotas on resources such as disk space, network bandwidth, and CPU time, allowing administrators to control and optimize the allocation of resources within an IT environment.
You will find this term commonly used in Systems Management
Quota Monitoring
The practice of tracking the use of resources against established quotas to manage capacity, ensure fair usage, and prevent service degradation. It's commonly applied in cloud services, databases, and network management.
You will find this term commonly used in Cloud Computing/IT Management
Quota Sampling
A sampling method used in research where the sample is gathered in a way that the proportions of certain characteristics in the sample correspond to the proportions of those characteristics in the population.
You will find this term commonly used in Data Analysis
Quota System
A system that limits the amount of disk space or resources (such as CPU, memory, or network bandwidth) that users or applications can use. It helps in managing system resources in multi-user environments.
You will find this term commonly used in Systems Management
QVD (QlikView Data) File
A proprietary file format used by QlikView, a business intelligence and visualization software, to store data extracted from various sources. QVD files are optimized for fast data loading.
You will find this term commonly used in Data Management
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