Sean Morrissey, a security expert, said on Thursday that the tracking on Apple devices isn't new, or a surprise, to those in the computer forensics community.

安全专家Sean Morrissey周四说，苹果追踪器设备对那些计算机取证团体而言，不是新的设备，或者一个惊奇。

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With the same GPS tracking system and emergency call buttons the riders can alert our expert emergency medical truck with world class expedition medics, who will spring into action.

通过同样的GPS跟踪系统和紧急呼叫按钮，我们的专业的紧急救援车辆将立刻赶到现场，世界顶级的探险医疗队伍将立刻采取行动。

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Elaine Orler, president of Talent Function Group LLC and an expert on the tracking systems, says they should be more candidate-friendly.

WSJ: Your Resume vs. Oblivion

Satellite and space expert Dr Stuart Eves stressed the large uncertainties involved in tracking the "decay" of satellite orbits (their slow fall back into the Earth's atmosphere).

BBC: Nasa refines satellite crash time

Dan Baker, who by day works a loss prevention expert for Sears Holdings in Dallas, has spent a chunk of his free time indulging his hobby of tracking weather facts across the U.S. since 1998.

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