The Encyclopedia Americana, Volume 7Grolier Incorporated, 1999 - Encyclopedias and dictionaries A thirty-volume encyclopedia covering important world events while providing major new treatments of selected topics in various academic fields. |
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Page 112
They appear at a height of about 50 miles ( 80 km ) and re- main in sunlight when the area below has become dark . Clouds Outside the Troposphere . Occasionally clouds are found very much higher above the earth's surface than clouds are ...
They appear at a height of about 50 miles ( 80 km ) and re- main in sunlight when the area below has become dark . Clouds Outside the Troposphere . Occasionally clouds are found very much higher above the earth's surface than clouds are ...
Page 492
In the 1980s and 1990s , with encryption becoming ever cheaper , better , and more common , another threat loomed - the gov- ... The anticipation of social effects of technol- ogy has become a field of study in social science called ...
In the 1980s and 1990s , with encryption becoming ever cheaper , better , and more common , another threat loomed - the gov- ... The anticipation of social effects of technol- ogy has become a field of study in social science called ...
Page 493
But many indi- viduals who practiced " hacking " in their youth have become major contributors to technical ad- vances in computer software . Future Prospects . As the use of computers and other digital information technologies become ...
But many indi- viduals who practiced " hacking " in their youth have become major contributors to technical ad- vances in computer software . Future Prospects . As the use of computers and other digital information technologies become ...
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