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  2. Letter frequency - Wikipedia

    en.wikipedia.org/wiki/Letter_frequency

    The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. 801–873 AD), who formally developed the method (the ciphers breakable by this technique go ...

  3. E series of preferred numbers - Wikipedia

    en.wikipedia.org/wiki/E_series_of_preferred_numbers

    Electronic color codecolor-code used to indicate the values of axial electronic components, such as resistors, capacitors, inductors, diodes (also see IEC 60062). Geometric progression; Preferred number; Renard series – used for current rating of electric fuses

  4. List of countries by English-speaking population - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    The European Union is a supranational union composed of 27 member states. The total English-speaking population of the European Union and the United Kingdom combined (2012) is 256,876,220 [66] (out of a total population of 500,000,000, [67] i.e. 51%) including 65,478,252 native speakers and 191,397,968 non-native speakers, and would be ranked 2nd if it were included.

  5. Oxford English Dictionary - Wikipedia

    en.wikipedia.org/wiki/Oxford_English_Dictionary

    As a historical dictionary, the Oxford English Dictionary features entries in which the earliest ascertainable recorded sense of a word, whether current or obsolete, is presented first, and each additional sense is presented in historical order according to the date of its earliest ascertainable recorded use. [5]

  6. Morse code - Wikipedia

    en.wikipedia.org/wiki/Morse_code

    Morse can be sent by persons with severe motion disabilities, as long as they have some minimal motor control. An original solution to the problem that caretakers have to learn to decode has been an electronic typewriter with the codes written on the keys. Codes were sung by users; see the voice typewriter employing Morse or votem. [53]

  7. Ohm's law - Wikipedia

    en.wikipedia.org/wiki/Ohm's_law

    Ohm's law, in the form above, is an extremely useful equation in the field of electrical/electronic engineering because it describes how voltage, current and resistance are interrelated on a "macroscopic" level, that is, commonly, as circuit elements in an electrical circuit.

  8. United Kingdom - Wikipedia

    en.wikipedia.org/wiki/United_Kingdom

    The English language is the official and most spoken language of the United Kingdom. [386] [387] The United Kingdom proactively promotes the language globally to build connections, understanding and trust between people in the UK and countries worldwide. [388] [389] It is estimated that 95 per cent of the UK's population are monolingual English ...

  9. List of mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_mnemonics

    To remember the order of taxa in biology (Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species, [Variety]): "Dear King Philip Came Over For Good Soup" is often cited as a non-vulgar method for teaching students to memorize the taxonomic classification of system.