DVR stands for "Digital Video Recorder", which is a general recording electronic device, while a Set Top Box is a television appliance, that enables the TV to explore and display the subscribed...

Both, DVR and CCTV are electronic devices. A DVR functions as a video recorder, while a CCTV functions as a closed circuit television.

A DVR is a recorder, while a DVD is a storage device.

Both, DVR and NVR video recorders record the video in the digital format. The only difference is that, NVR as compared to DVR records the videos directly from the network.

TiVo and DVR are digital video recorders, that are connected externally to the television, and vary in the sizes of their hard drive . TiVo recorders are private recorders of TiVo, Inc, whereas DVR (sometimes...