CCTV is convenient for keeping records, as it can act as an automated system able to allow you to prove to customers and check yourself that, for example, their shipments were indeed deployed. Precedently, storing recordings was quite a problem, either on magnetic tape or VHS tapes. A lot of the units on the market these days use CDR technology, which allows to store many hours of surveillance on a single disk. This may be convenient for law enforcement officials and security staff in office buildings and manufacturing facilities.