CCTV Cameras
Produce images or recordings for surveillance purposes, and can be either video cameras, or digital stills cameras.
DVRs
Records video in a digital format to a disk drive or other memory medium within a device.
Access Control
Enables an authority to control access to areas and resources in a given physical facility or computer-based information system
Biometrics
Refers to methods for uniquely recognizing humans based upon intrinsic physical or behavioral traits. Used to identify individuals in groups that are under surveillance.
Walk Through
mainly used in government agencies, customs, airports, stations, stadiums, exhibition venues, entertainment, large gathering places, etc.
2-way Radios
Radio that can both transmit and receive (a transceiver), unlike a broadcast receiver which only receives content.
