The Global Positioning System (GPS) is a global navigation satellite system (GNSS) developed by the United States Department of Defense - Wikipedia. This satellite-based navigation system includes 24 orbiting satellites comprising one single network. There are also some other space-based positioning, navigation, and timing (PNT) systems. Many manufacturer of handheld and portable GPS systems products provide support online. GPS is a complex technology, but understanding it can be quite easy. You need to have access to some Global positioning system reviews and manuals. GPS Information on Garmin, Lowrance, Magellan, Qstarz, iBlue, Holux, Globalsat and other consumer receivers. We are going to publish here GPS reviews, descriptions of handheld GPS systems, mapping software and more. GPS solutions for your Car, Motorcycle, PDA and mobile phone - The smart choice in personal navigation. Portable GPS car navigation systems. Garmin GPS system, Magellan GPS, Tom Tom GPS, SPOT Satellite Messenger, GPS software, handheld GPS, many GPS maps for portable GPS receivers. Next will go GPS related products for navigation and tracking, recreational, automobile, marine, aviation, professional and OEM.