Surveillance CCTV software is the intermediary that ties together digital video cameras and Personal Computers (PCs) or Macintosh Computers (Macs) as well as Digital Video Recorder (DVR) units for standalone systems.  It’s also the main portion of remote DVR monitoring applications (Apps) that allows your smartphone to access your video security system.  It essence it provides the programming that allows you to control the camera, monitor the camera, and record the digital video files.