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  1. Computer (32773 bytes)
    18: ... the problem, the result must be displayed to the user as [[output]] through output devices like light b...
    20: Novice users, especially children, often have difficulty unde...
    54: ...cted from [[thermionic valve]]s (tubes). In the [[1950s]] and [[1960s]] valves were gradually replaced ...
    76: ...d [[Vannevar Bush]]'s [[Differential analyser]] [[1932]]), and General-Purpose devices of the type used...
    79: ...ecution, and the reliability of the machine. In [[1934]] [[Alan Turing]] proved that, given the right p...
  2. Computer mouse (29399 bytes)
    15: ... System"''. At the time, Engelbart intended that users would ''continuously'' hold the mouse in one han...
    54: ...ons, ranging from five to more. Depending on the user's preferences, the extra buttons might allow forw...
    64: ...actile feedback, gives a better response from the user.
    70: ...on a single press. Modern operating systems allow users to set the maximum interval in which the two cli...
    73: A ''triple click'' occurs when the user presses the button three times in quick successio...
  3. Global warming (53726 bytes)
    26: ...n observed may vary according to the focus of the user of the term: sometime since the [[Industrial Revo...
    58: ... of more than 50 parts per million by volume from 1958 to the present.
    78: ...surement of CO<sub>2</sub> mixing ratios began in 1958 at [[Mauna Loa]]. Since then, the annually aver...
    84: ...for half of the temperature variations prior to [[1950]], but that the net effect of such natural forci...
    102: ...illion years (Veizer et al. 2000, Nature 408, pp. 698-701) concluded that long-term temperature variat...

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