Definition 
Edit
Surveillance technology includes the following:
1. Electronic eavesdropping technology (audio surveillance)
- Radiating devices and receivers (e.g., miniaturized transmitters)
- Nonradiating devices (e g., wired surveillance systems, including telephone taps and concealed microphones)
- Tape recorders
2. Optical/imaging technology (visual surveillance)
- Photographic techniques
- Television (closed circuit and cable)
- Night-vision devices (use image intensifier to view objects under low light)
- Satellite-based
3. Computers and related technologies (data surveillance)
- Microcomputers (decentralization of machines and distributed processing)
- Computer networks
- Software (e.g., expert systems)
- Pattern recognition systems
4. Sensor technology
5. Other devices and technologies
- Citizen band radios
- Vehicle location systems
- Machine-readable magnetic strips
- Polygraph
- Voice stress analyzer
- Voice recognition
- Laser interception
- Cellular radio
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