This document summarizes 10 research papers on various location tracking systems. It begins by defining location tracking systems and their importance in fields like transportation, security, and more. It then summarizes the key technologies used in location tracking like GPS, GSM, RFID, and Google Maps. The majority of the papers discussed Android-based systems that use GPS signals from smartphones to determine and share a target's location in real-time. Several papers focused on using SMS messages or mobile apps to alert contacts if a target strayed from their planned route or moved outside a predefined area. Overall, the document provides an overview of different techniques for real-time person and object tracking using wireless technologies and location-based services.