CCTV

Though most people know cctv is part of a security system, CCTV has many other valuable functions.

CCTV can be used to:

monitor situations in locations where it would be dangerous for humans.
monitor situations where it would be cost prohibitive to use human resources.
video can be recorded, providing video log of historical events for analyses and verification.
provides financial security. (most banks, stores and government agencies cannot get insurance unless they have cctv systems.)
courts rely heavily on evidence cctv recording can provide.
discourage criminal activity. (the very presence of a working camera is sometimes enough to defuse and/or prevent a costly situation.)