4 definitions in this view. Search all 509 terms by name, phrase or topic.
Routing glossary · AI Glossary · About these definitions
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- Computers & specificationsKernel
The core of an operating system that manages resources and provides essential services to software. Its responsibilities commonly include memory, scheduling and interaction with device drivers.
Link to this term- Computers & specificationsKeyboard
An input device with keys used to enter characters and commands. Its physical layout, key mapping and connection method are separate compatibility considerations.
Link to this term- AccessibilityKeyboard focus
The state that identifies which interface element currently receives keyboard input. A visible focus indicator helps users locate that element as they move through links, buttons and fields. Test both where focus moves and whether it remains visible; a screen reader’s reading position can be separate from keyboard focus.
Guide: Website Accessibility Check: A Practical First Audit
Reference: W3C: Focus Visible
Link to this term- Energy & environmentKilowatt-hour
An energy unit equal to using one kilowatt continuously for one hour, or 3.6 million joules. For example, 2 kW sustained for half an hour uses 1 kWh. At a hypothetical energy price of $0.20 per kWh, that energy costs $0.20 before other charges. Distinguish energy purchased at the meter from energy stored in a battery.
Guide: Green Cars: Compare the Whole Transportation Choice
Reference: NIST: energy-unit conversions
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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