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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...
24: ... it is obvious these terms were in use prior to 1946.
29: ...ssus]] in 1943 and the [[ENIAC]] announced in [[1946]], were huge devices that weighed tons, occupied...
54: ...ted from [[thermionic valve]]s (tubes). In the [[1950s]] and [[1960s]] valves were gradually replaced ... - Computer mouse (29399 bytes)
1: ...Optical encoding disks include light holes.<br>'''4:''' Infrared LEDs shine through the disks.<br>
11: ...ttp://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: ...ay of 18*18 [[pixels]], and each pixel can sense 64 different levels of gray.
37: ...mely fast movement, though high-end mice track at 40 inches per second and faster. Also, maintenance ... - Global warming (53726 bytes)
1: ...px|right|Global mean surface temperatures 1856-2004]]
3:
5:
18: In 2004 Naomi Oreskes published a survey of 928 peer-revi...
25: ...cadal scale. The unsmoothed, annual value for 2004 is also plotted for reference.]]
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