Final answer:
GPS Chips and RFID Tags are technologies that refer to trackers installed in arms. GPS uses satellite systems to track precise locations, while RFID is used for proximity-based tracking. The use of tracking devices extends to vehicles, smartphones, and public surveillance systems.
Step-by-step explanation:
The term tracker installed in a person's arm, as described in the question, could refer to various technologies, but based on the context of tracking, the closest options would be GPS Chips or RFID Tags. GPS Chips are designed to use the Global Positioning System to determine and track the precise location of an object or person. RFID Tags, which stands for Radio Frequency Identification, can be used for tracking as well, although they are typically used in a proximity sense, meaning they are read when passing near a scanner.
Technological advancement has led to the introduction of tracking devices in various forms. Vehicles can be monitored through electronic toll collection systems like E-ZPass, and personal location can be constantly updated through smartphones that connect with cell towers and other wireless devices. Furthermore, police may deploy devices such as Stingrays to track cell phones, and public surveillance systems can use facial recognition to monitor individuals.