Currently the majority of CCTV systems use Digital technology. Digital CCTV Surveillance uses current PC technology to digitize the CCTV camera images and compress them into a PC friendly format. These digital images can then be stored on a PC's Hard Disk Drive. As the digital cctv images are stored on computers Hard Drives it is possible to save digital cctv footages and access them speedily and easily. Digital CCTV also has the advantage over Analogue CCTV systems that the image is of a far higher resolution.