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  2. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    The use of S (as in VIIS to indicate 7 1 ⁄ 2) is attested in some ancient inscriptions [45] and also in the now rare apothecaries' system (usually in the form SS): [44] but while Roman numerals for whole numbers are essentially decimal, S does not correspond to 5 ⁄ 10, as one might expect, but 6 ⁄ 12.

  3. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    39 – Italy. 39 (0549) – San Marino (interchangeably with 378) 39 (06 698) – Vatican City (assigned 379 but not in use) 40 – Romania; 41 – Switzerland. 41 (91) – Campione d'Italia, an Italian enclave. 91 is actually the prefix for the Swiss canton Ticino in which the enclave resides. Its phone system is fully integrated into the ...

  4. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    "A base is a natural number B whose powers (B multiplied by itself some number of times) are specially designated within a numerical system." [1]: 38 The term is not equivalent to radix, as it applies to all numerical notation systems (not just positional ones with a radix) and most systems of spoken numbers. [1]

  5. NATO phonetic alphabet - Wikipedia

    en.wikipedia.org/wiki/NATO_phonetic_alphabet

    The International Radiotelephony Spelling Alphabet or simply Radiotelephony Spelling Alphabet, commonly known as the NATO phonetic alphabet, is the most widely used set of clear-code words for communicating the letters of the Roman alphabet. Technically a radiotelephonic spelling alphabet, it goes by various names, including NATO spelling ...

  6. Alphabetic numeral system - Wikipedia

    en.wikipedia.org/wiki/Alphabetic_numeral_system

    An alphabetic numeral system employs the letters of a script in the specific order of the alphabet in order to express numerals. In Greek, letters are assigned to respective numbers in the following sets: 1 through 9, 10 through 90, 100 through 900, and so on. Decimal places are represented by a single symbol.

  7. List of mobile telephone prefixes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_telephone...

    268 7xx. 10. NANP member. Argentina. +54. 9/15. 10. All carriers: Claro, Movistar, Personal, Tuenti. 15 before the local number but after long distance area code for national calls (0 11 15 xxxx-xxxx) and 9 placed after the international access code excluding the 15 for international calls (+54 9 11 xxxx-xxxx).

  8. List of date formats by country - Wikipedia

    en.wikipedia.org/wiki/List_of_date_formats_by...

    The year is written in Arabic numerals. The name of the month can be written out in full or abbreviated, or it can be indicated by Roman numerals or Arabic numerals. The day is written in Arabic numerals. [72] [73] [74] MSZ ISO 8601:2003 Iceland: No: Yes: No (dd.mm.yyyy) [75] [76] IST EN 28601:1992 India: Yes: Yes: Sometimes

  9. Numerical digit - Wikipedia

    en.wikipedia.org/wiki/Numerical_digit

    Numerical digit. The ten digits of the Arabic numerals, in order of value. A numerical digit (often shortened to just digit) or numeral is a single symbol used alone (such as "1") or in combinations (such as "15"), to represent numbers in a positional numeral system. The name "digit" comes from the fact that the ten digits (Latin digiti meaning ...