Radio-frequency Identification (RFID) has become synonymous in its use for logistical tracking purposes, providing large businesses, military, and governments alike with better insight into their supply chains. RFID technology is also becoming ever more important for the evolving Internet-of-Things (IoT) where billions upon trillions of devices are electronically interconnected through the world. Many of these devices are expected to leverage RFID for tagging, tracking, and sensing applications where low-cost, small form-factor, extremely low-power sensors are required. Non-surprisingly, wireless power transfer (WPT) technology is critical for enabling the IoT. This course introduces the basic concepts of RFID technology, reviews the major parts of a system, and reviews the fundamentals of wireless power transfer.