
Radio Frequency Identification (RFID)
Radio Frequency Identification (RFID) tagging is the use of very small electronic devices (called 'RFID tags') which are applied to or incorporated into a product, animal, or person for the purpose of identification and tracking using radio waves. The tags can be read from several meters away. They are extremely cheap, costing a few cents a piece, so they can be inserted into many types of everyday products without significantly increasing the price, and can be used to track and identify these objects for a variety of purposes.
Many companies are already "tagging" their workers, who are monitored while on the job. Workers in U.K. went on general strike in protest of having themselves tagged. They felt that it was dehumanizing to have all of their movements tracked with RFID chips. Some critics have expressed fears that people will soon be tracked and scanned everywhere they go.

Micro Air Vehicle
Micro Air Vehicle with attached surveillance camera.
HART program concept drawing from official IPTO (DARPA) official website.
Aerial surveillance is the gathering of surveillance, usually visual imagery or video, from an airborne vehicle—such as a unmanned aerial vehicle, helicopter, or spy plane.
Digital imaging technology, miniaturized computers, and numerous other technological advances over the past decade have contributed to rapid advances in aerial surveillance hardware such as micro-aerial vehicles, forward-looking infrared, and high-resolution imagery capabale of identifying objects at extremely long distances. For instance, the MQ-9 Reaper, a U.S. drone plane currently used for domestic operations by the Department of Homeland Security, carries cameras that are capable of identifying an object the size of a milk carton from altitudes of 60,000 feet, and has forward-looking infrared devices that can detect the heat from a human body at distances of up to 60 kilometers.