Surveillance devices are tools used to monitor and observe activities. A WIRETAP is a device that allows for the interception of telephone conversations, while a CAM is a camera used to record video footage. A BUG is a listening device that can be hidden in a room to record conversations, and a TAP is a device that records data from a computer or other electronic device. A spycam is a small camera that can be hidden in an object to record video without being noticed, and a hiddencamera is a camera that is concealed in an object to record video without being seen.