1) Austrian invention 2) Digital technology 
A digital clock is a type of clock that displays the time digitally (i.e. in numerals or other symbols), as opposed to an analog clock, where the time is indicated by the positions of rotating hands. Digital clocks are often associated with electronic drives, but the `digital` description refers only to the display, not to the drive mechanism. (.....
noun a clock that displays the time of day digitally
a clock that displays the time in numerical digits rather than by hands on a dial. Cf. analog clock.