CCTV is abbreviated as "closed circuit television" and they are mainly used in crime prevention, hacking art, video art, industrial processes, traffic monitoring , transport safety and control of retail.
The first ever CCTV was installed by a German and to a popular belief there are only 1.8 billion CCTV's present in the United Kingdom. In UK, for every 100 people there are 2.8 CCTV cameras for surveillance round the clock.
The usage of CCTV's is 23% effective in public transport and at parking lots installing of CCTV has resulted in 51% decrease in the crime rate. Every 7 out of 10 criminal activities including murder cases are solved by usage CCTV footage.
In Leeds, police have installed 14 cameras to combat with criminals indulged in crime activities. In last 18 months, crime rate has fell down by 48% and the number of burglaries have dropped down by 65%. Reports show that 57 criminals were arrested in a single week due to CCTV coverage.