Cellular telephone apparatuses; GPS tracking devices; Computer hardware and software systems for receiving and processing a wireless communication from a person having a GPS tracking device in case of emergency or distress; computerized response centers comprised of computer hardware and software systems for receiving and processing emergency distress communications using an automated response system; Electronic devices for locating and tracking people using wireless network, cellular or radio transmission of geolocation signals to provide medical, emergency or distress assistance via telecommunication and global computer networks; Emergency response system for elderly persons, invalids and the like, comprising a cellular, wireless network or radio transmitter, GPS, global navigation satellite system (GNSS), and enhanced 911 (e911) geolocation system, and simplified user interface to generate a transmission including a location of the person in case of emergency or distress or to locate the person if lost; Sensors for scientific use to be worn by a human to gather human biometric, medical, and health data and also including a geolocation tracking device to provide a communication of the location of the human in case of emergency or distress, sold as a unit; emergency and medical emergency geolocation-indicating signal transmitters; Global positioning system (GPS)