Digital Video Recorder (DVR)
A digital video recorder (DVR) (also called Personal video recorder (PVR)) is a device that records video to a digital storage medium. The term includes stand-alone set-top boxes, digital video cameras with such functionality and software for personal computers which enables video capture and playback to and from disk.
The first DVR was tested on July 8th, 1965, when CBS explored the possibilities of instant freeze-frame and rewind for sporting event broadcasts. Ampex released the first commercial hard disk video recorder in 1967. The HS-100 recorded analog video onto a digital hard disk and could store a maximum of only 30 seconds.