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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 ...
81: ...g-complete, so far (the proof was developed in [[1998]]). While the Z3 and possibly other early device...
84: ...DVAC]]. The [[EDVAC]] was not operational until [[1953]] due to technical difficulties in implementing ... - Computer mouse (29399 bytes)
11: ...ttp://www.freepatentsonline.com/3987685.html 3987685].]]
15: ... System"''. At the time, Engelbart intended that users would ''continuously'' hold the mouse in one han...
19: ...sonal computer]]s throughout the [[1980s]] and [[1990s]]. The Xerox PARC group also settled on the mo...
47: ...en one and three buttons, although in the late [[1990s]] some mice sprouted five or more.
54: ...ons, ranging from five to more. Depending on the user's preferences, the extra buttons might allow forw... - Global warming (53726 bytes)
1: ...umb|250px|right|Global mean surface temperatures 1856-2004]]
5:
26: ...n observed may vary according to the focus of the user of the term: sometime since the [[Industrial Revo...
42: ...e comparable to those of the 20th century before 1990. "Moberg's reconstruction will help to put the r...
58: ... of more than 50 parts per million by volume from 1958 to the present.
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