Gyroscopes, accelerometers and altimeters provide more accurate positioning than is possible using global-positioning system (GPS) satellites alone.

ECONOMIST: Inside story

As Global Positioning System (GPS) chip sets have dropped in price and become more accurate, companies including Google, Microsoft and Yahoo are basing their contextual advertising platforms on them.

FORBES: Connect

These observations were systematized, made spatially accurate and registered on the spot through the development of a mini-computer equipped with a global positioning system that hunters affixed to their snowmobiles.

UNESCO: Social and Human Sciences