Multiple functions of physical security are presented in this A to Z guide. Physical and Technical Security: An Introduction furnishes readers with an industry-based perspective and a practitioner's point of view on all phases of physical security, including what works and what does not, through a careful mix of theory and practical application. Readers will obtain a solid foundation in both the technological and operational aspects of physical security through comprehensive coverage that explores such principal topics as security electronics, communications systems, test equipment, video and optics, alarm systems, computers and security software, access control, and more.