Just as we identify things using information from our senses, so do computers. They can identify physical objects only by using information from their sensors. One of the best-known digital identification techniques is radio frequency identification, or RFID. The RFID tag pasted on the side of a book may seem like a universal marker, but what it means depends on who reads it. Based on the projects from the first edition of Making Things Talk (from the same author), this book shows you how to create projects with Arduino, Processing, and the Getting Started with RFID kit from Maker SHED to identify physical objects.