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- 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 ...
84: ...DVAC]]. The [[EDVAC]] was not operational until [[1953]] due to technical difficulties in implementing ...
90: ...ern Automatic Computer|SEAC]] [[US]] [[May 9]], [[1950]] - Computer mouse (29399 bytes)
11: ...http://www.freepatentsonline.com/3835464.htm 3835464]. Ball and two rollers with spring by ''Opocentsk...
15: ... System"''. At the time, Engelbart intended that users would ''continuously'' hold the mouse in one han...
26: ...ray of 18*18 [[pixels]], and each pixel can sense 64 different levels of gray.
33: [[Image:Optical_mouse_shining.jpg|thumb|250px|The Logitech iFeel optical mouse uses a red LED...
50: [[image:computer.mouse.750pix.jpg|thumb|right|250px|Two wireless computer mice, with scroll wheels]... - Global warming (53726 bytes)
1: [[Image:Instrumental_Temperature_Record.png|thumb|250px|right|Global mean surface temperatures 1856-200...
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.
62: ...e:Vostok 420ky 4curves insolation.jpg|thumb|right|250px|[[Solar variation]] and [[greenhouse gas]]es (g...
71: [[Image:Carbon Dioxide 400kyr.png|thumb|right|250px|[[Carbon dioxide]] during the last 400,000 year...
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