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  2. List of ISO 3166 country codes - Wikipedia

    en.wikipedia.org/wiki/List_of_ISO_3166_country_codes

    The sortable table below contains the three sets of ISO 3166-1 country codes for each of its 249 countries, links to the ISO 3166-2 country subdivision codes, and the Internet country code top-level domains (ccTLD) which are based on the ISO 3166-1 alpha-2 standard with the few exceptions noted. See the ISO 3166-3 standard for former country codes.

  3. Butadiene - Wikipedia

    en.wikipedia.org/wiki/Butadiene

    1,3-Butadiene (/ ˌ b juː t ə ˈ d aɪ iː n / ⓘ) [8] is the organic compound with the formula CH 2 =CH-CH=CH 2.It is a colorless gas that is easily condensed to a liquid. It is important industrially as a precursor to synthetic rubber. [9]

  4. Comparison of alphabetic country codes - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_alphabetic...

    BUR - IOC code for Burkina Faso [f] (since 1984) [g], and historical ISO and FIFA code for Burma [h] (until 1989) [i] In the following cases, a code for a historical country or territory matches a modern code of the country it merged into: VNM - historical IOC and ISO code for South Vietnam [j], became the ISO code for unified Vietnam [k]

  5. Country code top-level domain - Wikipedia

    en.wikipedia.org/wiki/Country_code_top-level_domain

    A country code top-level domain (ccTLD) is an Internet top-level domain generally used or reserved for a country, sovereign state, or dependent territory identified with a country code. All ASCII ccTLD identifiers are two letters long, and all two-letter top-level domains are ccTLDs.

  6. Butadiene (data page) - Wikipedia

    en.wikipedia.org/wiki/Butadiene_(data_page)

    Download QR code; Print/export Download as PDF; ... Chemical formula: C 4 H 6: Molar mass: 54.09 g/mol Synonyms butadiene, biethylene, divinyl, erythrene, vinylethylene

  7. C4H6 - Wikipedia

    en.wikipedia.org/wiki/C4H6

    Download QR code; Print/export ... move to sidebar hide. The molecular formula C 4 H 6 (molar mass: 54.09 g/mol ... 1,3-Butadiene; 1,2-Butadiene; Bicyclobutane;

  8. Country code - Wikipedia

    en.wikipedia.org/wiki/Country_code

    ISO 3166-1 alpha-2: two-letter code; ISO 3166-1 alpha-3: three-letter code; ISO 3166-1 numeric: three-digit code; The two-letter codes are used as the basis for other codes and applications, for example, for ISO 4217 currency codes; with deviations, for country code top-level domain names (ccTLDs) on the Internet: list of Internet TLDs.

  9. ISO 3166-1 - Wikipedia

    en.wikipedia.org/wiki/ISO_3166-1

    It defines three sets of country codes: [1] ISO 3166-1 alpha-2 – two-letter country codes which are used most prominently for the Internet's country code top-level domains (with a few exceptions). ISO 3166-1 alpha-3 – three-letter country codes which allow a better visual association between the codes and the country names than the alpha-2 ...