10 definitions in this view. Search all 509 terms by name, phrase or topic.
Routing glossary · AI Glossary · About these definitions
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- NetworksQoS
Quality of service: mechanisms and policies that classify and treat network traffic differently. Prioritization, queueing and resource controls can support service goals, but do not create unlimited link capacity.
Link to this term- NetworksQuad (cabling)
A group of four conductors arranged as two pairs in telecommunications cabling. The cable's construction and specification determine how those conductors are used.
Link to this term- Business & organizationsQuality assurance
Planned processes that provide confidence that requirements will be met. Reviews, documented methods and audits can help prevent recurring quality problems.
Link to this term- Business & organizationsQuality control
Operational checks and activities used to assess and control whether an output meets requirements. Inspection and testing are common examples; acceptance criteria determine what counts as passing.
Link to this term- Security & privacyQuarantine (security software)
Isolating a suspected file so that it cannot be used in the usual way while it is assessed. A quarantine report concerns that item; broader checks may still be needed to understand what happened on the system.
Read the guide: Antivirus Protection: What You Need and How to Check It
Reference: Microsoft: virus and threat protection
Link to this term- Rocks & EarthQuartz
A crystalline mineral composed of silicon dioxide, SiO2. It occurs in many rock types and in several colors; color is only one observation to combine with other identification evidence.
Read the guide: Tonalite: Composition, Formation, and Comparison with Granite
Reference: National Park Service: minerals
Link to this term- Science & measurementQuartz clock
A clock whose timekeeping uses the regular oscillation of a quartz crystal. Its accuracy depends on the oscillator and conditions such as temperature as well as the clock's design.
Link to this term- Web & documentsQuery string
The part of a URL introduced by ?, often carrying parameters such as q=radio. Its meaning is defined by the receiving application; parameter names and values need appropriate encoding.
Read the guide: How to Read a URL: Domains, Paths, Queries, and Fragments
Reference: WHATWG URL standard
Link to this term- NetworksQUIC
A secure transport protocol carried over UDP, supporting multiplexed streams, connection establishment and congestion control. HTTP/3 uses QUIC; the use of UDP underneath does not remove QUIC's own delivery and security mechanisms.
Read the guide: OSI Layers in Practice: Follow a Connection, Find a Fault
Reference: QUIC specification (RFC 9000)
Link to this term- Computers & specificationsQVL
Qualified vendor list: a manufacturer's record of components tested for compatibility with a specified product. For memory, match the exact module or kit and the listed system conditions, including supported module counts. A similar part number is not the same test result, and absence from a QVL does not by itself prove incompatibility.
Guide: RAM Upgrades: Capacity, Compatibility, and Stable Settings
Reference: Corsair: memory compatibility and QVLs · ASUS: example QVL with module-count conditions (PDF)
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A starting point for understanding
Each entry gives a concise meaning and, where useful, a distinction or practical example. Topic labels identify the context; the same acronym can have several meanings. Historical names remain useful when reading older coverage.
Follow the linked Yenra guides for fuller explanations and the reference links for supporting documentation. Health, technical and regulatory terms describe concepts; individual decisions depend on the applicable evidence, equipment and circumstances.
Collection updated October 13, 2026. Full glossary · AI Glossary