Abbreviated as RTLS, Real Time Locating System is a fully automated Wi-Fi-based tracking system that uses RF tags on the objects to be tracked, and then uses wireless technology to detect the the presence and location of the RF tags in real time. RTLS is similar to RFID (radio frequency identification), however RFID tags are read as they pass fixed points and RTLS tags are automatically and continuously read. Some RTLS systems use GPStechnology to locate tags.
See also “All About RFID” in the Did You Know…? sectionof Webopedia.