Surveillance technology refers to tools, devices, or systems that are used to watch, monitor, or track people's activities, often in a secretive or hidden manner. Full definition
This has led to the construction of a range of highly equipped units monitored by a range of surveillance technologies. (politics.co.uk)
The business also provides enhanced security and video surveillance technology to clients who are looking for more protection. (business-opportunities.biz)
This method makes it impossible for surveillance technology to draw correlations in addresses used in multiple transactions. (hacked.com)