1. How Stuff Works: Global Positioning System Receivers - Explanation of Global Positioning System (GPS) receivers. 2. GPS Devices - Reviews of GPS receivers written by consumers at Epinions.com. Can be viewed by price range, brand, mapping capability, marine features. 3. GPS Reviews - Top-rated GPS handheld portable units, in-car systems, and PDA/computer plugin receivers. Where to find reviews in computer or technology publications and web sites. Links to reviews, with comments and credibility rating.

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