GPS Information
& History

GPSinformation.net - a comprehensive site of GPS information.

Team Markwell's GPS Adventures - an informative site for geocachers.

Garmin - website of Garmin, one of the leading GPSr manufacturers.

Magellan - website of Magellan, one of the leading GPSr manufacturers.

DeLorme- website of Delorme, one of the leading GPSr manufacturers.

Lowrance- website of Lowrance, one of the leading GPSr manufacturers.

The Rand Corporation's History of GPS - a detailed description of the GPS program.

A report on the Global Positioning System - another history of GPS.

A Short History of Geocaching and The History of Geocaching are 2 histories of geocaching.