Then: On May 3, 2000, computer consultant Dave Ulmer of Beavercreek, Ore., posted online the longitude and latitude of a bucket of trinkets in the woods outside Portland,to celebrate Global Positioning System (GPS) signals becoming available for civilian use two days earlier.
With the coordinates, he outlined the basic rules for the sport now known as geocaching, where cachers use a GPS devices to locate the longitude and latitude of a hidden container.
Three years later, Dick Kloke of Harvard learned about geocaching and started hunting. He found his first cache at the former Naval Ammunition Depot without the use of a GPS device. He had borrowed a device from a friend, but didn't know how to insert coordinates, so Kloke gave it back. Kloke didn't have a problem finding his first cache because he knew the area so well. He found his first geocache using only the description on a geocaching website.