DVI is a digital video interface used for computer displays. It is an alternative to VGA which is an anlog interface.
DVI is also compatible with HDMI interfaces with one or two limitaitons. DVI does not carry audio so a separate audio lead will be needed. Also. HDMI supports a content protection system called HDCP. Therefore, HDCP protected signals on an HDMI output, as may be found on Bluray discs among others, may well not operate with a DVI input.