Any Digital Video Recorder (DVR) specifically designed for mobile use where images need to be recorded. Vehicles present a more extreme environment than typical DVR installations, thus most mobile digital video recorders (MDVRs) are ruggedized against vibration, shock, and thermal extremes. This is particularly important in MDVRs with hard disk drives (HDDs) to prevent the head from skipping while writing data to the disk. This segment also includes HDCC TV recorders.