The third application is the transmission of technical information from computers monitoring the car's mechanical parts direct to the manufacturer or dealer.

ECONOMIST: Clean machine

It could, for instance, be particularly useful in environmental monitoring of smokestacks and car exhausts.

ECONOMIST: Lasers

Leckar responded that those are questions for another day, but this case was about the illegal attachment of a monitoring device to a car.

FORBES: GPS Case Leaves Justices Groping For A Rule