Before revision: Replica of The Thing which contained a Soviet bugging device, on display at the NSA's National Cryptologic Museum The Thing, also known as the Great Seal bug, was one of the first covert devices (or "bugs") to use passive techniques to transmit an audio signal.
After revision: listeningReplica of The Thing which contained a Soviet bugging device, on display at the NSA's National Cryptologic Museum The Thing, also known as the Great Seal bug, was one of the first covert devices (or "bugs") to use passive techniques to transmit an audio signal.