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  2. Plus–minus sign - Wikipedia

    en.wikipedia.org/wiki/Plus–minus_sign

    In medicine, it may mean "with or without" in some cases. [6] [7] In engineering, the sign indicates the tolerance, which is the range of values that are considered to be acceptable or safe, or which comply with some standard or with a contract. In chemistry, the sign is used to indicate a racemic mixture.

  3. Plus and minus signs - Wikipedia

    en.wikipedia.org/wiki/Plus_and_minus_signs

    In this usage, '−5' names a number the same way 'semicircle' names a geometric figure, with the caveat that 'semi' does not have a separate use as a function name. In many contexts, it does not matter whether the second or the third of these usages is intended: −5 is the same number.

  4. Alcohol by volume - Wikipedia

    en.wikipedia.org/wiki/Alcohol_by_volume

    The alcohol by volume shown on a bottle of absinthe. Alcohol by volume (abbreviated as alc/vol or ABV) is a standard measure of the volume of alcohol contained in a given volume of an alcoholic beverage, expressed as a volume percent.

  5. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    Ten-codes, especially "10-4" (meaning "understood") first reached public recognition in the mid- to late-1950s through the television series Highway Patrol, with Broderick Crawford. [citation needed] Ten-codes were adapted for use by CB radio enthusiasts. C. W.

  6. Angel Number 13—What It Means, Why You're Seeing It and ...

    www.aol.com/lifestyle/angel-number-13-means-why...

    The meaning of seeing the angel number 1313 in love is much the same as seeing the number 13, with more of an enhancement on twin flames. Since this number is double 13s, it is definitely an ...

  7. The Incredible Meaning Behind Angel Number 13 Could ... - AOL

    www.aol.com/incredible-meaning-behind-angel...

    What does the angel number 13 or 1313 mean? According to Mystic Michaela, author of The Angel Numbers Book, podcast host of Know Your Aura with Mystic Michaela!, the number 13 can be a prosperous ...

  8. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    A medieval accounting text from 1301 renders numbers like 13,573 as "XIII. M. V. C. III. XX. XIII", that is, "13×1000 + 5×100 + 3×20 + 13". [ 39 ] Other numerals that do not fit the usual patterns – such as VXL for 45, instead of the usual XLV — may be due to scribal errors, or the writer's lack of familiarity with the system, rather ...

  9. What 'secret' loudspeaker codes mean at department stores - AOL

    www.aol.com/news/2010-10-13-what-secret...

    If you've been shopping in a big box retail store you've probably heard an announcement on the loudspeaker such as, "code yellow toys, code yellow toys." This "code" is one of many innocuous ...