He accessed using the TAC and nothing jumped him. Encouraged, Andy called up his file. He found no alerts and nothing he could reasonably call cautionary notes—until he took advantage of Russ’s access and did a review of his file’s background structure and found a watchdog alarm and a tag-along with a relay tracer stuck to the file’s access gate. The watchdog would tell whoever had set it that someone had accessed the file, and the tag-along would be set to follow the trespasser wherever he went in the Matrix after that, letting the relay tracer ship out bulletins on his activity whenever convenient. It was the Matrix equivalent of a "tail." commonly used by security operations that wanted to observe somebody’s Matrix activities. Observing the placement of the programs, Andy decided they didn’t belong to Telestrian matrix security; security’s watchdogs would be embedded in the file rather than tacked on.