safety ensurity sucurity bank now ' if ' you want to ' i approve it ' .. ent 119' Unofficial .. 699 911 Radio-frequency identification ( RFID ) is the wireless use of electromagnetic fields to transfer data, for the purposes of automatically identifying and tracking tags attached to objects. The tags contain electronically stored information. Some tags are powered by electromagnetic induction from magnetic fields produced near the reader. Some types collect energy from the interrogating radio waves and act as a passive transponder. Other types have a local power source such as a battery and may operate at hundreds of meters from the reader. Unlike a barcode , the tag does not necessarily need to be within line of sight of the reader and may be embedded in the tracked object. RFID is one method for Automatic Identification and Data Capture (AIDC). [1] RFID tags are used in many industries. For example, an RFID tag at...