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  2. Indian rupee sign - Wikipedia

    en.wikipedia.org/wiki/Indian_rupee_sign

    The Indian rupee sign ₹ is the currency symbol for the Indian rupee ( ISO 4217: INR), the official currency of India. Designed by D. Udaya Kumar, it was presented to the public by the Government of India on 15 July 2010, [1] following its selection through an open competition among Indian residents. [2] [3] Before its adoption, the most ...

  3. Battery nomenclature - Wikipedia

    en.wikipedia.org/wiki/Battery_nomenclature

    Battery numbering. IEC 60086 battery type designation system. Examples of the IEC nomenclature are batteries coded R20, 4R25X, 4LR25-2, 6F22, 6P222/162, CR17345 and LR2616J. The letters and numbers in the code indicate the number of cells, cell chemistry, shape, dimensions, the number of parallel paths in the assembled battery and any modifying ...

  4. List of ISO 639 language codes - Wikipedia

    en.wikipedia.org/wiki/List_of_ISO_639_language_codes

    ISO 639 is a standardized nomenclature used to classify languages. Each language is assigned a two-letter (set 1) and three-letter lowercase abbreviation (sets 2–5). Part 1 of the standard, ISO 639-1 defines the two-letter codes, and Part 3 (2007), ISO 639-3, defines the three-letter codes, aiming to cover all known natural languages, largely superseding the ISO 639-2 three-letter code standard.

  5. Button (computing) - Wikipedia

    en.wikipedia.org/wiki/Button_(computing)

    For keyboard buttons, see Keyboard (computing). In computing, a button (sometimes known as a command button or push button) is a graphical control element that provides the user a simple way to trigger an event, like searching for a query at a search engine, or to interact with dialog boxes, like confirming an action. [1]

  6. Gold Star Lapel Button - Wikipedia

    en.wikipedia.org/wiki/Gold_Star_Lapel_Button

    A Gold Star Lapel Button (left) and Next of Kin Lapel Button. A Gold Star Lapel Button in the United States is an official decoration authorized by an Act of Congress that is issued to the direct next of kin family members of service members who died in World War I, World War II, and subsequent armed hostilities in which the Armed Forces of the United States has been engaged.

  7. Plus and minus signs - Wikipedia

    en.wikipedia.org/wiki/Plus_and_minus_signs

    The plus sign ( +) and the minus sign ( −) are mathematical symbols used to denote positive and negative functions, respectively. In addition, + represents the operation of addition, which results in a sum, while − represents subtraction, resulting in a difference. [1] Their use has been extended to many other meanings, more or less analogous.

  8. At sign - Wikipedia

    en.wikipedia.org/wiki/At_sign

    At sign. The at sign, @, is an accounting and invoice abbreviation meaning "at a rate of" (e.g. 7 widgets @ £ 2 per widget = £14), [1] now seen more widely in email addresses and social media platform handles. It is normally read aloud as "at" and is also commonly called the at symbol, commercial at, or address sign .

  9. Wt (web toolkit) - Wikipedia

    en.wikipedia.org/wiki/Wt_(web_toolkit)

    Website. www .webtoolkit .eu /wt. Wt (pronounced "witty") is an open-source widget -centric web framework for the C++ programming language. It has an API resembling that of Qt framework (although it was developed with Boost, and is incompatible when mixed with Qt), also using a widget-tree and an event-driven signal/slot system. [2]