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2. GPS tracking unit - Wikipedia

   en.wikipedia.org/wiki/GPS_tracking_unit

   GPS antenna size limits tracker size, often smaller than a half-dollar (diameter 30.61 mm). In 2020 tracking is a $2 billion business plus military-in the gulf war 10% or more targets used trackers. Virtually every cellphone tracks its movements. Tracks can be map displayed in real time, using GPS tracking software and devices with GPS ...

3. Microchip implant (human) - Wikipedia

   en.wikipedia.org/wiki/Microchip_implant_(human)

   Theoretically, a GPS-enabled chip could one day make it possible for individuals to be physically located by latitude, longitude, altitude, and velocity. [citation needed] Such implantable GPS devices are not technically feasible at this time.

4. Satellite navigation device - Wikipedia

   en.wikipedia.org/wiki/Satellite_navigation_device

   Vehicle navigation on a personal navigation assistant Garmin eTrex10 edition handheld. A satellite navigation device or satnav device, also known as a satellite navigation receiver or satnav receiver or simply a GPS device, is a user equipment that uses satellites of the Global Positioning System (GPS) or similar global navigation satellite systems (GNSS).

5. KidGuard - Wikipedia

   en.wikipedia.org/wiki/KidGuard

   KidGuard is a parental monitoring application for iOS and Android mobile phones.The application uses proprietary software to help parents monitor their children’s text messages, browser history, social media activity, stored videos or photos, emails, and phone GPS location.

6. Radio-frequency identification - Wikipedia

   en.wikipedia.org/wiki/Radio-frequency_identification

   In 2004, school authorities in the Japanese city of Osaka made a decision to start chipping children's clothing, backpacks, and student IDs in a primary school. [106] Later, in 2007, a school in Doncaster , England, piloted a monitoring system designed to keep tabs on pupils by tracking radio chips in their uniforms.

7. SPOT Satellite Messenger - Wikipedia

   en.wikipedia.org/wiki/SPOT_Satellite_Messenger

   SPOT is a GPS tracking device that uses the Globalstar satellite network [1] to provide text messaging and GPS tracking (depending on the subscription type purchased). [2] [3] It has a coverage area that includes a large portion of the planet, with the exception of extreme northern and southern latitudes and parts of the Pacific Ocean. [4]