This document provides an overview of radio frequency identification (RFID) technology including its components, differences from barcodes, applications, and case studies. It discusses RFID systems consisting of tags, readers, and antennas. Example applications mentioned include inventory management, logistics/supply chain, retail, security, and location tracking. Case studies presented involve using RFID in medical settings to track blood samples, in manufacturing to track production processes, and in construction material management. The document also outlines research using RFID to help people with sensory impairments navigate public transportation.