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			Not so long ago, UPS  drivers worked off maps, 3-x-5 note cards, and their own memory to  figure out the best way to run their routes. That changed in 2005 when  UPS began to implement a $600 million route optimization system--think  MapQuest on steroids--that each evening maps out the next day's schedule  for the majority of its 56,000 drivers. So sophisticated is the  software that it designs each route to minimize the number of left  turns, thus reducing the time and gas that drivers waste idling at  stoplights.