There are different types of Camera surveillance products - the Security Camera AKA The CCTV, DVR and more.
Security Cameras Extensive Gallery:
Camera surveillance or Close Circuit Television (CCTV) is is quite similar to other ways of TV transmissions it differs by broadcasting to a limited set of screens. The CCTV is usually placed where its needed the most - in particular the most unprotected region in any zone, whether it's a public place like a school, or in a home, and in a work place.
Security cameras have been invented in 1942 - during world war two and since then have been developed so they can be marketed to the public. Today you can hand pick a security camera that will fit your exact needs. You can either go for the digital video recorder - or better known as the DVR. These digital video recorder use digital memory for recording the footage and are very popular with camera surveillance buyers in the 21st century. The most popular DVR security cameras are probably the pioneer DVR and the DirecTV DVR. Other popular surveillance cameras are the wireless surveillance camera - they occurred require no wires and offer easy installation. These High-Tech cameras usually work on infrared and can spot movement in utter darkness. For more on the topic of home security - check out the our Home Security Chicago page. | 
