Buyer's Guide GPS recievers

GPS
By Leif Pettersen

You'll never have to ask for directions again. Since it was introduced to the public in 2000, GPS has quickly moved from a hush-hush national defense resource to being a multi-faceted part of our everyday lives. This dizzyingly complex system, involving 30 medium Earth orbit satellites and an annual maintenance budget of $750 million, has been boiled down to one of the easiest to use and most versatile new gadgets on the consumer market. GPS is widely used to assist in aviation, map-making, and land surveying, and a variety of scientific and commercial uses, in addition to getting you to the dentist with a minimum of wrong turns.

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