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  2. ISO 7010 - Wikipedia

    en.wikipedia.org/wiki/ISO_7010

    Shape and colour of sign types Sign type [1] Meaning Colour (per ISO 3864-4) [7] Shape [7] Example Prohibition sign: Must not do: Red: Circle with diagonal line: No open flame Mandatory sign: Must do: Blue: Circle: Use hearing protection Warning sign: Warn of hazard: Yellow: Equilateral triangle with rounded corners: Explosive materials Safe ...

  3. List of typographical symbols and punctuation marks - Wikipedia

    en.wikipedia.org/wiki/List_of_typographical...

    The second is a link to the article that details that symbol, using its Unicode standard name or common alias. (Holding the mouse pointer on the hyperlink will pop up a summary of the symbol's function.); The third gives symbols listed elsewhere in the table that are similar to it in meaning or appearance, or that may be confused with it;

  4. Floor and ceiling functions - Wikipedia

    en.wikipedia.org/wiki/Floor_and_ceiling_functions

    In mathematics, the floor function is the function that takes as input a real number x, and gives as output the greatest integer less than or equal to x, denoted ⌊x⌋ or floor(x). Similarly, the ceiling function maps x to the least integer greater than or equal to x, denoted ⌈x⌉ or ceil(x). [1]

  5. List of logic symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_logic_symbols

    In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics.

  6. Threshold (architecture) - Wikipedia

    en.wikipedia.org/wiki/Threshold_(architecture)

    A threshold is the sill of a door. Some cultures attach special symbolism to a threshold. It is called a door saddle in New England. [citation needed] Door thresholds cover the gap between the floor and the door frame, helping to prevent any water leaks, insects or draughts from entering through the opening.

  7. Why a closed bedroom door could save your life in a fire - AOL

    www.aol.com/news/2017-06-20-why-a-closed-bedroom...

    Pina said a closed door in a recent fire her department dealt with was the reason a little boy survived a house fire that overtook the home. SEE ALSO: Removing the screws from your door could help ...

  8. Emergency exit - Wikipedia

    en.wikipedia.org/wiki/Emergency_exit

    Emergency exit in Universitetet metro station in Stockholm. An emergency exit in a building or other structure is a special exit used during emergencies such as fires.The combined use of regular and emergency exits allows for faster evacuation, and emergency exits provide alternative means of evacuation if regular exits are inaccessible.

  9. Signage - Wikipedia

    en.wikipedia.org/wiki/Signage

    Signage is the design or use of signs and symbols to communicate a message. [1] [2] Signage also means signs collectively or being considered as a group. [3] The term signage is documented to have been popularized in 1975 to 1980. [2] Signs are any kind of visual graphics created to display information to

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