Growth naturally stimulates change, and CCTV technology has been no exception. A system that once merely required cameras, cabling, and video monitors has now become a complex electronic confi guration of equipment intertwined with both computer and telecommunications technologies. This dramatic change is directly related to the introduction of digital technology. Why do we need to understand how digital technology works, and what does it have to do with the future of security? It’s simple—the newest revolution in technology is pervasive computing. Computers are or soon will be everywhere, linked to everything, and everything will be connected by the Internet—including security systems.