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  2. International English Language Testing System - Wikipedia

    en.wikipedia.org/wiki/International_English...

    Speaking: 10-15 minutes. Total: 2 hours 45 minutes: Score range: 0 to 9, in 0.5 band increments: Score validity: 24 Months: Offered: Up to 4 times a month. Up to 48 times a year. [1] Regions: More than 4,000 test centres in over 140 countries [2] Languages: English: Annual number of test takers: Over 3.5 million in 2018 [3] Prerequisites: No ...

  3. List of Collins GEM books - Wikipedia

    en.wikipedia.org/wiki/List_of_Collins_GEM_books

    Collins Gem Dictionary of Biography (1971) Collins GEM is a collection of miniature books and dictionaries by HarperCollins.The original Collins firm published its first dictionary in the year 1824, and its first series of Collins Illustrated Dictionaries in 1840, including the Sixpenny Pocket Pronouncing Dictionary, which sold approximately 1 million copies.

  4. Decimal separator - Wikipedia

    en.wikipedia.org/wiki/Decimal_separator

    Any such symbol can be called a decimal mark, decimal marker, or decimal sign. Symbol-specific names are also used; decimal point and decimal comma refer to a dot (either baseline or middle ) and comma respectively, when it is used as a decimal separator; these are the usual terms used in English, [ 1 ] [ 2 ] [ 3 ] with the aforementioned ...

  5. Collins COBUILD Advanced Dictionary - Wikipedia

    en.wikipedia.org/wiki/Collins_COBUILD_Advanced...

    The Collins COBUILD Advanced Dictionary [1] (CCAD) from HarperCollins, first published in 1987, [2] is a dictionary that distinguished itself by providing definitions in full sentences, rather than excerpted phrases. Example sentences are given for almost every meaning of every word, drawn from a large corpus of actual usage.

  6. Collins English Dictionary - Wikipedia

    en.wikipedia.org/wiki/Collins_English_Dictionary

    The unabridged Collins English Dictionary was published on the web on 31 December 2011 on CollinsDictionary.com, along with the unabridged dictionaries of French, German, Spanish and Italian. [5] The site also includes example sentences showing word usage from the Collins Bank of English Corpus, word frequencies and trends from the Google ...

  7. A2 Key - Wikipedia

    en.wikipedia.org/wiki/A2_Key

    A2 Key (previously known as the Key English Test (KET) and Cambridge English: Key) was developed through trials conducted between 1991 and 1994. [ 2 ] It was created to offer students a basic qualification in English and provide the first step for those wishing to progress towards higher level qualifications, such as B1 Preliminary , B2 First ...

  8. Speech - Wikipedia

    en.wikipedia.org/wiki/Speech

    Speech is the use of the human voice as a medium for language. Spoken language combines vowel and consonant sounds to form units of meaning like words, which belong to a language's lexicon.

  9. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    According to Mikhail B. Sevryuk, in the January 2006 issue of the Bulletin of the American Mathematical Society, "The number of papers and books included in the Mathematical Reviews (MR) database since 1940 (the first year of operation of MR) is now more than 1.9 million, and more than 75 thousand items are added to the database each year. The ...