Rank | Abbreviation | Meaning |
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***** | GLOBAL WARMING. | A world-wide weather phenomenon characterized by rising average temperatures and violent storms, caused by the increase of carbon dioxide and other so-called greenhouse gases as a result of human acti
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**** | GLOBAL INDICATOR. | A code that appears next to the fare and tells what route the travel must take.
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*** | GLOBAL POSITIONING SYSTEM. | A system using satellites and cellular communication to pinpoint a vehicle's or aircraft's location. Now being introduced in rental cars and about to be tested by the FAA.
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