Closed circuit television also known as CCTV is the industry standard in surveillance security cameras. CCTV can be a single network of cameras or multiple networks of camera linked together via switches, internet, DVR or wide area computer technology. CCTV Video data is analog. The analog signal can be converted to digital via CCTV Digital Video Recorders. Once the video data is digital it can be managed just like any other computer data and can be stored automatically on computers and network storage devices.